Diurethanes and methods for their use in herbicidal compositions
The invention concerns novel diurethanes, methods for their preparation as well as a selective herbicidal composition containing at least one of these compounds. 
     Herbicidal diurethanes are already known (German published Pat. No. 1,567,151, U.S. Pat. No. 3,692,820). A very good selectivity is shown by these compounds with respect to beets, but in other cultures, such as for example cotton, bush beans, peanuts, potatees, rice and alfalfa, this selectivity is not shown. 
     It is therefore an object of the invention to provide new active agents with increased selective herbicidal properties. 
     The object is achieved according to the invention through a composition which contains at least one compound of the general formula ##STR2## in which R 1  is hydrogen, C 1  -C 4  alkyl or C 2  -C 4  alkenyl, R 2  is phenyl, methylphenyl, methoxyphenyl, chlorophenyl, dichlorophenyl, cyclohexyl, benzyl or phenylethyl, R 3  is C 1  -C 4  alkyl, C 2  -C 4  alkenyl, C 2  -C 4  alkinyl, chloro-C 1  -C 4  alkyl, chloro-C 1  -C 4  alkenyl, or chloro-C 2  -C 4  alkinyl, and X is oxygen or sulfur. 
     The inventive diurethanes exhibit a very broad spectrum of activity with full compatibility towards many agricultural culture plants and are therefore a technical advance over the known urethanes in this respect. 
     The inventive diurethanes are seen to have a broad leaf herbicidal activity and thus can be used for combatting dicotyledonous weeds. 
     In post emergence treatments, weeds such as for example Amaranthus, Stellaria, Matricaria, Lamium, Centaurea, Ipomea, Solanum, Brassica, Senecio, Chrysanthemum, Polygonum and others are combatted. 
     To combat the weeds as a rule amounts of between about 1 kg to 5 kg/ha are applied. At this rate of application, the active agents are selective in useful plant cultures such as cotton, bush beans, peanuts, potatoes, rice, sugar beets and alfalfa. 
     The inventive compounds may be used alone, in mixtures with one another or in mixtures with other active agents. If desired, other agents such as defoliants, plant protection agents or pest control agents can be added, according to the desired purpose. 
     Insofar as a broadening of the activity spectrum is desired, other herbicides can also be added. For example, suitable mixture partners can be selected from such active agent types as triazines, aminotriazoles, anilides, diazines, uracils, aliphatic carboxylic acids and aryloxycarboxylic acids and hydrazides, amides, nitriles and esters of such carboxylic acids, carbamide and thiocarbamide esters, ureas, 2,3,6-trichlorobenzyloxypropanil, thiocyanogen-containing compounds and other additives. 
     Advantageously the inventive compounds or mixtures thereof are applied in the form of preparations such as powders, dusts, granulates, solutions, emulsions or suspensions, with addition of liquid and/or solid carrier materials or thinners and if desired with emulsifiers, dispersants, adhesives and/or wetting agents. 
     As solid carrier material are suitable such substances as mineral earths, such as tonsil, silica gel, talcum, kaolin, attaclay, calcite, and silica, and plant products, such as flours. 
     Suitable liquid carriers include water, aliphatic and aromatic hydrocarbons such as benzene, toluene, xylene, cyclohexanone, isophorone, dimethylsulfoxide, and dimethylformamide, as well as mineral oil fractions. 
     As useful surface active agents should be mentioned as examples calcium lignin sulfonate, polyoxyethylenealkyl phenol ether, naphthalene sulfonic acid and salts thereof, phenol sulfonic acids and salts thereof, formaldehyde condensates, fatty alcohol sulfates as well as substituted benzene sulfonic acids and salts thereof. 
     The amount of active agent or agents in the various preparations can be varied within a wide range. By example, the agents contain between about 10 and 80 weight-% active agent, between about 90 to 20 weight-% liquid or solid carrier material as well as if desired up to 20 weight-% of surface active ingredients. 
     Application of the compositions can be effected in conventional manner, for example, with water as carrier in spray amounts of about 100 to 1000 liter/ha. Application of the compositions in the so-called Low-Volume- and Ultra-Low-Volume-Processes is also possible, as is their application in the form of so-called microgranulates. 
     The novel diurethanes according to the invention may be prepared, for example by 
     (a) reacting a compound of the general formula ##STR3## with an amine of the general formula ##STR4## in the presence of an acid acceptor, for example, with addition of excess amine, or an inorganic base like sodium hydroxide or potassium carbonate, or a tertiary organic base, such as triethylamine; or 
     (b) reacting a compound of the general formula ##STR5## in the presence of a tertiary organic base such as triethylamine or pyridine, or as the alkali salt, with carbamoyl chlorides of the general formula ##STR6## at temperatures between about 0°-100° C., where R 1 , R 2  and R 3  have the above meaning. 
    
    
     The invention may be better understood through the following examples. 
     EXAMPLE 1 
     N-(1-cyano-2-phenylpropyl)-N-methylcarbaminic acid-3-(methoxycarbonylamino)-phenyl ester 
     Into a solution of 17.4 g (0.1 Mol) 2-methylamino-3-phenyl-butyronitrile in 100 ml ethyl acetate a solution of 22.9 g (0.1 Mol) chloroformic acid-3-methoxycarbonylaminophenyl ester in 50 ml ethyl acetate and simultaneously a solution of 13.8 g (0.1 Mol) potassium carbonate in 50 ml water are added dropwise wtih cooling to about 10° to 15° and with stirring. The organic phase is separated, washed with diluted hydrochloric acid at 0° C. and water, dried with magnesium sulfate and concentrated under reduced pressure. The product is crystallized from ethyl acetate/pentane. 
     Yield: 28.9 g=79% of theory. 
     M.P.: 121° C. 
     in an analogous manner the following inventive compounds can be prepared. 
     
         ______________________________________                                    
                          Physical                                        
Compound                  Constants                                       
______________________________________                                    
α-Cyanobenzyl-carbaminic acid-[3-                                   
                          M.P.:                                           
(methoxy-carbonylamino)phenyl]-ester                                      
                          168° C.                                  
α-Cyanobenzyl)-carbaminic acid-[3-                                  
                          M.P.:                                           
(ethoxycarbonylamino)-phenyl]-ester                                       
                          180° C.                                  
α-Cyanobenzyl-carbaminic acid-[3-                                   
                          M.P.:                                           
(methylthiocarbonylamino)-phenyl]-                                        
                          188° C.                                  
ester                                                                     
α-Cyanobenzyl-carbaminic acid-[3-                                   
                          M.P.:                                           
(ethylthiocarbonylamino)-phenyl]-                                         
                          199° C.                                  
ester                                                                     
α-Cyanobenzyl-carbaminic acid-[3-                                   
                          M.P.:                                           
(1-methylethoxycarbonylamino)-                                            
                          185° C.                                  
phenyl]-ester                                                             
α-Cyanobenzyl-carbaminic acid-[3-                                   
                          M.P.:                                           
(2-methylpropoxycarbonylamino)-                                           
                          178° C.                                  
phenyl]-ester                                                             
α-Cyanobenzyl-carbaminic acid-[3-                                   
                          M.P.:                                           
(1-methylpropoxycarbonylamino)-                                           
                          162° C.                                  
phenyl]-ester                                                             
α-Cyanobenzyl-N-butyl-carbaminic acid-                              
                          M.P.:                                           
[3-(methylthio-carbonylamino)-phenyl]-                                    
                          96° C.                                   
ester                                                                     
α-Cyanobenzyl-N-(2-methylpropyl)-                                   
                          M.P.:                                           
carbaminic acid-[3-(methoxycar-                                           
                          95° C.                                   
bonylamino)-phenyl]-ester                                                 
α-Cyanobenzyl-N-(2-methylpropyl)-                                   
                          M.P.:                                           
carbaminic acid-[3-(methylthio-car-                                       
                          110° C.                                  
bonylamino)-phenyl]-ester                                                 
α-Cyanobenzyl-N-butyl-carbaminic                                    
                          M.P.:                                           
acid-[3-(2-methylpropoxycarbonyl-                                         
                          69° C.                                   
amino)-phenyl]-ester                                                      
α-Cyanobenzyl-N-butyl-carbaminic                                    
                          n.sub.D 20                                      
acid-[-(1-methylpropoxycarbonylamino)-                                    
                          1,5210                                          
phenyl]-ester                                                             
α-Cyanobenzyl-N-(2-methylpropyl)-car-                               
                          M.P.:                                           
baminic acid-[3-(2-methylpropoxycar-                                      
                          70° C.                                   
bonylamino)-phenyl]-ester                                                 
α-Cyanobenzyl-N-butyl-carbaminic acid-                              
                          M.P.:                                           
[3-(allyloxycarbonylamino)-phenyl]-                                       
                          81° C.                                   
ester                                                                     
α-Cyanobenzyl-N-butyl-carbaminic acid-                              
                          M.P.:                                           
[3-(methoxycarbonylamino)-phenyl]-ester                                   
                          61° C.                                   
α-Cyanobenzyl-N-butyl-carbaminic acid-                              
                          M.P.:                                           
[3-(ethoxycarbonylamino)-phenyl]-ester                                    
                          71° C.                                   
α-Cyanobenzyl-N-methyl-carbaminic acid-                             
                          n.sub.D 20                                      
[3-(methoxycarbonylamino)-phenyl]  -ester                                 
                          1,5581                                          
α-Cyanobenzyl-N-methyl-carbaminic acid-                             
                          M.P.:                                           
[3-(allyloxycarbonylamino)-phenyl]-                                       
                          123° C.                                  
ester                                                                     
α-Cyanobenzyl-N-methyl-carbaminic                                   
                          M.P.:                                           
acid-[3-(2-methylpropoxycarbonyl-                                         
                          93° C.                                   
amino)-phenyl]-ester                                                      
α-Cyanobenzyl-N-ethyl-carbaminic acid-                              
                          M.P.:                                           
[3-(allyloxycarbonylamino)-phenyl]-ester                                  
                          98° C.                                   
α-Cyanobenzyl-N-methylcarbaminic acid-                              
                          M.P.:                                           
[3-(ethoxycarbonylamino)-phenyl]-ester                                    
                          113° C.                                  
α-Cyanobenzyl-N-methyl-carbaminic acid-                             
                          M.P.:                                           
[3-(ethylthiocarbonylamino)-phenyl-ester                                  
                          94° C.                                   
α-Cyanobenzyl-N-ethyl-carbaminic acid-                              
                          M.P.:                                           
[3-(ethoxycarbonylamino)-phenyl]-ester                                    
                          96° C.                                   
α-Cyanobenzyl-N-ethyl-carbaminic acid-                              
                          M.P.:                                           
[3-(ethylthiocarbonylamino)-phenyl]-ester                                 
                          100° C.                                  
α-Cyanobenzyl-N-ethyl-carbaminic acid-                              
                          M.P.:                                           
[3-(2-methylpropoxycarbonylamino)-phenyl]-                                
                          92° C.                                   
ester                                                                     
α-Cyanobenzyl-N-ethyl-carbaminic acid-                              
                          M.P.:                                           
[3-(methylthiocarbonylamino)-phenyl]-ester                                
                          94° C.                                   
α-Cyanobenzyl-N-allylcarbaminic acid-                               
                          M.P.:                                           
[3-(methoxycarbonylamino)-phenyl]-ester                                   
                          81° C.                                   
α-Cyanobenzyl-N-allyl-carbaminic acid-                              
                          M.P.:                                           
[3-(ethoxycarbonylamino)-phenyl]-ester                                    
                          76° C.                                   
α-Cyanobenzyl-N-allyl-carbaminic acid-[3-                           
                          M.P.:                                           
(ethylthiocarbonylamino)-phenyl]-ester                                    
                          96°-98° C.                        
α-Cyanobenzyl-N-allyl-carbaminic acid-[3-                           
                          M.P.:                                           
allyloxycarbonylamino)-phenyl]-ester                                      
                          86° C.                                   
N-(α-Cyanobenzyl)-N-allyl-carbaminic acid-                          
                          M.P.:                                           
[3-(2-propinyloxycarbonylamino)-phenyl]-                                  
                          83° C.                                   
ester                                                                     
N-(α-Cyanobenzyl)-N-ethyl-carbaminic acid-                          
                          M.P.:                                           
[3-(2-propinyloxycarbonylamino)-phenyl]-                                  
                          94° C.                                   
ester                                                                     
N-(α-Cyano-4-methylbenzyl)-N-ethyl-carbami-                         
                          M.P.:                                           
nic acid-[3-(methoxycarbonylamino)-phenyl]-                               
                          117° C.                                  
ester                                                                     
N-(α-Cyano-4-methylbenzyl)-N-ethyl-carbami-                         
                          M.P.:                                           
nic acid-[3-(ethoxycarbonylamino)-phenyl]-                                
                          120° C.                                  
ester                                                                     
N-(α  -Cyano-4-methylbenzyl)-N-ethyl-carbami-                       
                          M.P.:                                           
nic acid-[3-(ethylthiocarbonylamino)-phenyl]-                             
                          160° C.                                  
ester                                                                     
N-(α-Cyano-4-methylbenzyl)-N-ethyl-carbamini-                       
                          M.P.:                                           
nic acid-[3-(1-methylethoxycarbonylamino)-                                
                          125° C.                                  
phenyl]-ester                                                             
N-(α-Cyano-4-methylbenzyl)-N-ethyl-carbami-                         
                          M.P.:                                           
nic acid-[3-(allyloxycarbonylamino)-phenyl]-                              
                          103° C.                                  
ester                                                                     
N-(α-Cyano-4-methylbenzyl)-N-ethyl-carbami-                         
                          M.P.:                                           
nic acid-[3-(2-methylpropoxycarbonylamino)-                               
                          109° C.                                  
phenyl]-ester                                                             
N-(α-Cyano-4-methylbenzyl)-N-ethyl-carbami-                         
                          M.P.:                                           
nic acid-[3-(2-propinyloxycarbonylamino)-                                 
                          114° C.                                  
phenyl]-ester                                                             
N-(α-Cyano-3-methylbenzyl)-N-ethyl-carbami-                         
                          M.P.:                                           
nic acid-[3-(methoxycarbonylamino)-phenyl]-                               
                          113° C.                                  
ester                                                                     
N-(α-Cyano-3-methylbenzyl)-N-ethyl-carbami-                         
                          M.P.:                                           
nic acid-[3-(ethoxycarbonylamino)-phenyl]-                                
                          93° C.                                   
ester                                                                     
N-(α-Cyano-3-methylbenzyl)-N-ethyl-carbami-                         
                          M.P.:                                           
nic acid-[3-(2-propinyloxycarbonylamino)                                  
                          84° C.                                   
phenyl]-ester                                                             
N-(α-Cyanobenzyl)-N-methyl-carbaminic                               
                          M.P.:                                           
acid-[3-(1-methylethoxycarbonylamino)-                                    
                          96° C.                                   
phenyl]-ester                                                             
N-(α-Cyano-3-methylbenzyl)-N-ethylcarbami-                          
                          M.P.:                                           
nic acid-[3-(allyloxycarbonylamino)-phenyl]-                              
                          79° C.                                   
ester                                                                     
N-(α-Cyano-3-methylbenzyl)-N-ethylcarbami-                          
                          M.P.:                                           
nic acid-[3-(ethylthiocarbonylamino)-phenyl]-                             
                          144° C.                                  
ester                                                                     
N-(α-Cyano-3-methylbenzyl)-N-ethyl-carbami-                         
                          M.P.:                                           
nic acid-[3-(1-methylethoxycarbonylamino)-                                
                          95° C.                                   
phenyl]-ester                                                             
N-(α-Cyano-3-methylbenzyl)-N-ethyl-carbami-                         
                          M.P.:                                           
nic acid-[3-(2-methylpropoxycarbonylamino)-                               
                          93° C.                                   
phenyl]-ester                                                             
N-(α-Cyanobenzyl)-N-methyl-carbaminic acid-                         
                          M.P.:                                           
[3-(2-propinyloxycarbonylamino]-ester                                     
                          98° C.                                   
N-(α-Cyanobenzyl)-N-methyl-carbaminic acid-                         
                          M.P.:                                           
[3-(1-methylpropoxycarbonylamino)-phenyl]-                                
                          96° C.                                   
ester                                                                     
N-(α-Cyanobenzyl)-N-ethyl-carbaminic acid-                          
                          M.P.:                                           
[3-(1-methylethoxycarbonylamino)-phenyl]  -                               
                          88° C.                                   
ester                                                                     
N-(α-Cyano-4-methoxybenzyl)-N-ethyl-carbami-                        
                          M.P.:                                           
nic acid-[3-(ethoxycarbonylamino)-phenyl]-                                
                          95° C.                                   
ester                                                                     
N-(α-Cyano-4-methoxybenzyl)-N-ethyl-carbami-                        
                          M.P.:                                           
nic acid-[3-ethylthiocarbonylamino)-phenyl]-                              
                          115° C.                                  
ester                                                                     
N-(α-Cyano-4-methoxybenzyl)-N-ethyl-carbami-                        
                          M.P.:                                           
nic acid-[3-(1-methylethoxycarbonylamino)-                                
                          97° C.                                   
phenyl]-ester                                                             
N-(α-Cyano-4-methoxybenzyl)-N-ethyl-carbami-                        
                          M.P.:                                           
nic acid-[ 3-(2-methylpropoxycarbonylamino)-                              
                          93° C.                                   
phenyl] -ester                                                            
N-(α-Cyano-4-methoxybenzyl)-N-ethyl-carbami-                        
                          M.P.:                                           
nic acid-[ 3-(2-propinyloxycarbonylamino)-                                
                          94° C.                                   
phenyl]-ester                                                             
N-(α-Cyano-4-methoxybenzyl)-N-ethyl-carbami-                        
                          M.P.:                                           
nic acid -[3-(methylthiocarbonylamino)-                                   
                          164° C.                                  
phenyl]-ester                                                             
N-(α-Cyano-4-methoxybenzyl)-N-ethyl-carbami-                        
                          M.P.:                                           
nic acid-[ 3-(methylthiocarbonylamino)-phenyl]-                           
                          103° C.                                  
ester                                                                     
N(α-Cyano-4-chlorobenzyl)-N-ethyl-carbamin-                         
                          M.P.:                                           
ic acid-[ 3-(methoxycarbonylamino)-phenyl]-                               
                          136° C.                                  
ester                                                                     
N-(α-Cyano-4-chlorobenzyl)-N-ethyl-carbami-                         
                          M.P.:                                           
nic acid-[3-(methylthiocarbonylamino)-phenyl]-                            
                          150° C.                                  
ester                                                                     
N-(α-Cyano-4-chlorobenzyl)-N-ethyl-carbami-                         
                          M.P.:                                           
nic acid-[ 3-(ethoxycarbonylamino)-phenyl]-                               
                          155° C.                                  
ester                                                                     
N-(α-Cyano-4-chlorobenzyl)-N-ethyl-carbami-                         
                          M.P.:                                           
nic acid-[3-(allyloxycarbonylamino)-phenyl]-                              
                          100° C.                                  
ester                                                                     
N-(α-Cyano-4-chlorobenzyl)-N-ethyl-carbami-                         
                          M.P.:                                           
nic acid-[3-(ethylthiocarbonylamino)-phenyl]-                             
                          154° C.                                  
ester                                                                     
N-(α-Cyano-4-chlorobenzyl)-N-methyl-carbami-                        
                          M.P.:                                           
nic acid-[3-(methoxycarbonylamino)-phenyl]-                               
                          108° C.                                  
ester                                                                     
N-(α-Cyano-benzyl)-N-ethyl-carbaminic acid-                         
                          M.P.:                                           
[3-(methoxycarbonylamino)-phenyl]-ester                                   
                          82° C.                                   
N-(α-Cyano-benzyl)-N-ethyl-carbaminic acid-                         
                          n.sub.D 20                                      
[3-(1-methylpropoxycarbonylamino)-phenyl]-                                
                          1,5326                                          
ester                                                                     
N-(α-Cyano-benzyl)-N-allyl-carbaminic acid-                         
                          n.sub.D 20                                      
[3-(1-methylethoxycarbonylamino)-phenyl]-                                 
                          1,5413                                          
ester                                                                     
N-(α-Cyano-benzyl)-N-allyl-carbaminic acid-                         
                          M.P.:                                           
[3-(2-methylpropoxycarbonylamino)-phenyl]-                                
                          84° C.                                   
ester                                                                     
N-(α-Cyano-3,4-dichlorobenzyl)-N-ethyl-                             
                          M.P.:                                           
carbaminic acid-[3-(2-methylpropoxycar-                                   
                          94° C.                                   
bonylamino)-phenyl]-ester                                                 
N-(α-Cyano-3-chloro-benzyl)-N-ethyl-carba-                          
                          M.P.:                                           
minic acid-[3-(1-methylethoxycarbonylamino)-                              
                          128° C.                                  
phenyl]-ester                                                             
N-(α-Cyano-cyclohexyl-methyl)-N-methyl-                             
                          M.P.:                                           
carbaminic acid-[3-(methoxycarbonylamino)-                                
                          145° C.                                  
phenyl]-ester                                                             
N-(α-Cyano-cyclohexylmethyl)-N-methyl-car-                          
                          M.P.:                                           
baminic acid-[3-(ethylthiocarbonylamino)-                                 
                          114° C.                                  
phenyl]-ester                                                             
N-(α-Cyano-cyclohexylmethyl)-N-methyl-                              
                          M.P.:                                           
carbaminic acid-[3-(2-methylpropoxycarbonyl-                              
                          116° C.                                  
amino)-phenyl]-ester                                                      
N-(α-Cyano-3-methoxybenzyl)-N-methyl-carbami-                       
                          M.P.:                                           
nic acid-[3-(methylthiocarbonylamino)-phenyl]-                            
                          120° C.                                  
ester                                                                     
N-(α-Cyano-3-methoxy-benzyl)-N-methylcarbami-                       
                          M.P.:                                           
nic acid-[3-allyloxycarbonylamino)-phenyl]-                               
                          120° C.                                  
ester                                                                     
N-(α-Cyano-3-methoxy-benzyl)-N-methylcarbami-                       
                          M.P.:                                           
nic acid-[3-(2-propinyloxycarbonylamino)-                                 
                          109° C.                                  
phenyl]-ester                                                             
N-(α-Cyano-3-methoxy-benzyl)-N-methylcar-                           
                          M.P.:                                           
banilic acid-[3-(2-methylpropoxycarbonyl-                                 
                          92° C.                                   
amino)-phenyl]-ester                                                      
N-(1-Cyano-2-phenyl-ethyl)-N-methyl-carbami-                              
                          M.P.:                                           
nic acid-[3-(2-propinyloxycarbonylamino)-                                 
                          94° C.                                   
phenyl]-ester                                                             
N-(α-Cyano-3,4-dichlorobenzyl)-N-ethyl-                             
                          M.P.:                                           
carbaminic acid-[3-(methoxycarbonylamino)-                                
                          101-103° C.                              
phenyl]-ester                                                             
N-(α-Cyano-3-chlorobenzyl)-N-ethyl-carbami-                         
                          M.P.:                                           
nic acid-[3-(methoxycarbonylamino)-phenyl]-                               
                          91° C.                                   
ester                                                                     
N-(α-Cyano-3-methoxy-benzyl)-N-methylcarbam-                        
                          M.P.:                                           
inic acid-[3-(methoxycarbonylamino)-phenyl]-                              
                          107° C.                                  
ester                                                                     
N-(1-Cyano-2-phenyl-ethyl)-N-methylcarba-                                 
                          M.P.:                                           
minic acid-[3-(methoxycarbonylamino)-phenyl]-                             
                          84° C.                                   
ester                                                                     
N-(α-Cyanobenzyl)-N-ethyl-carbaminic acid-                          
                          n.sub.D 20                                      
[3-(4-chloro-2-butinyloxycarbonylamino)-                                  
                          1,5465                                          
phenyl]-ester                                                             
N-(1-Cyano-2-phenyl-ethyl)-N-methyl-carba-                                
                          M.P.:                                           
minic acid-[3-(allyloxycarbonylamino)-phenyl]-                            
                          79° C.                                   
ester                                                                     
N-(α-Cyano-2,6-dichlorobenzyl)-N-methylcarba-                       
                          M.P.:                                           
minic acid-[3-(methoxycarbonylamino)-phenyl]-                             
                          122° C.                                  
ester                                                                     
N-(α-Cyano-2,6-dichlorobenzyl)-N-methylcar-                         
                          M.P.:                                           
baminic acid-[3-(methylthiocarbonylamino)-                                
                          198° C.                                  
phenyl]-ester                                                             
N-(α-Cyano-2,6-dichlorobenzyl)-N-methylcar-                         
                          M.P.:                                           
baminic acid-[3-(2-propinyloxycarbonylamino)-                             
                          118° C.                                  
phenyl]-ester                                                             
N-(1-Cyano-2-phenyl-ethyl)-N-methyl-carba-                                
                          M.P.:                                           
minic acid-[3-(methylthiocarbonylamino)-                                  
                          103-105° C.                              
phenyl]-ester                                                             
N-(α-Cyano-2,6-dichlorobenzyl)-N-methyl-                            
                          M.P.:                                           
carbaminic acid-[3-(allyloxycarbonylamino)-                               
                          87-88° C.                                
phenyl]-ester                                                             
N-(α-Cyano-2,4-dichlorobenzyl)-N-methyl-                            
                          M.P.:                                           
carbaminic acid-[3-(methoxycarbonylamino)-                                
                          169-170° C.                              
phenyl]-ester                                                             
N-(α-Cyano-2,4-dichlorobenzyl)-N-methylcar-                         
                          M.P.:                                           
baminic acid-[3-(methylthiocarbonylamino)-                                
                          143-144° C.                              
phenyl]-ester                                                             
N-(α-Cyano-2,4-dichlorobenzyl)-N-methyl-                            
                          M.P.:                                           
carbaminic acid-[3-(allyloxycarbonylamino)-                               
                          126-127° C.                              
phenyl]-ester                                                             
N-(α-Cyano-2,4-dichlorobenzyl)-N-methyl-                            
                          M.P.:                                           
carbaminic acid-[3-(2-propinyloxycarbonyl-                                
                          151-152° C.                              
amino)-phenyl]-ester                                                      
N-(α-Cyano-3-chlorobenzyl)-N-ethylcarba-                            
                          M.P.:                                           
minic acid-[3-(allyloxycarbonylamino)-phenyl]-                            
                          107-110° C.                              
ester                                                                     
N-(α-Cyano-3-chlorobenzyl)-N-ethylcarbami-                          
                          M.P.:                                           
nic acid-[3-(2-propinyloxycarbonylamino)-                                 
                          104-105° C.                              
phenyl]-ester                                                             
N-(α-Cyano-3-chlorobenzyl)-N-ethylcarba-                            
                          M.P.:                                           
minic acid-[3-(methylthiocarbonylamino)-                                  
                          137° C.                                  
phenyl]-ester                                                             
N-(1-Cyano-2-phenyl-propyl)-N-methylcarba-                                
                          M.P.:                                           
minic acid-[3-(ethoxycarbonylamino)-phenyl]-                              
                          120° C.                                  
ester                                                                     
N-(1-Cyano-2-phenyl-propyl)-N-methyl-carba-                               
                          M.P.:                                           
minic acid-[3-(methylthiocarbonylamino)-                                  
                          108° C.                                  
phenyl]-ester                                                             
N-(α-Cyano-3-chlorobenzyl)-N-ethylcarbami-                          
                          M.P.:                                           
nic acid-3-(ethoxycarbonylamino)-phenyl-ester                             
                          131° C.                                  
N-(α-Cyano-3,4-dichlorobenzyl)-N-methyl-                            
                          M.P.:                                           
carbaminic acid-[3-methoxycarbonylamino)-                                 
                          118-119° C.                              
phenyl]-ester                                                             
N-(α-Cyano-3,4-dichlorobenzyl)-N-methylcar-                         
                          M.P.:                                           
baminic acid-[3-(ethoxycarbonylamino)-phenyl]-                            
                          104° C.                                  
ester                                                                     
N-(α-Cyano-3,4-dichlorobenzyl)-N-methylcar-                         
                          M.P.:                                           
baminic acid-[3-(methylthiocarbonylamino)-                                
                          138° C.                                  
phenyl]-ester                                                             
N-(α-Cyano-3,4-dichlorobenzyl)-N-methylcar-                         
                          M.P.:                                           
baminic acid-[3-(allyloxycarbonylamino)-                                  
                          116- 117° C.                             
phenyl]-ester                                                             
N-(α-Cyano-3,4-dichlorobenzyl)-N-methyl-                            
                          M.P.:                                           
carbaminic acid-[3-(2-propinyloxycarbonyl-                                
                          145° C.                                  
amino)-phenyl]-ester                                                      
N-(1-Cyano-2-phenylpropyl)-N-methylcarba-                                 
                          M.P.:                                           
minic acid-[3-(2-propinyloxycarbonylamino)-                               
                          134-135° C.                              
phenyl]-ester                                                             
N-(1-Cyano-2-phenylpropyl)-N-methylcarba-                                 
                          n.sub.D 20                                      
minic acid-[3-(allyloxycarbonylamino)-                                    
                          1,5420                                          
phenyl]-ester                                                             
N-(1-Cyano-2-phenylpropyl)-N-methyl-                                      
                          M.P.:                                           
carbaminic acid-[3-(ethylthiocarbonylamino)-                              
                          114-116° C.                              
phenyl]-ester                                                             
N-(α-Cyano-3-chlorobenzyl)-N-methylcarba-                           
                          M.P.:                                           
minic acid-[3-(methoxycarbonylamino)-                                     
                          122-123° C.                              
phenyl]-ester                                                             
N-(1-Cyano-2-phenylpropyl)-N-methylcarba-                                 
                          M.P.:                                           
minic acid-[3-(1-methylethoxycarbonylamino)-                              
                          115-116° C.                              
phenyl]-ester                                                             
N-(α-Cyano-3-chlorobenzyl)-N-methylcarba-                           
                          M.P.:                                           
minic acid-[3-(ethoxycarbonylamino)-phenyl]-                              
                          129-130° C.                              
ester                                                                     
N-(α-Cyano-3-chlorobenzyl)-N-methylcarbami-                         
                          M.P.:                                           
nic acid-[3-(methylthiocarbonylamino)-phenyl]-                            
                          130-133° C.                              
ester                                                                     
N-(α-Cyano-3-chlorobenzyl)-N-methylcarbami-                         
                          M.P.:                                           
nic acid-[  3-(ethylthiocarbonylamino)-phenyl]-                           
                          122° C.                                  
ester                                                                     
N-(α-Cyano-3-chlorobenzyl)-N-methylcarbami-                         
                          M.P.:                                           
nic acid-[3-(1-methylethoxycarbonylamino)-                                
                          127° C.                                  
phenyl]-ester                                                             
N-(α-Cyano-3-chlorobenzyl)-N-methylcarba-                           
                          M.P.:                                           
minic acid-[3-(allyloxycarbonylamino)-phenyl]-                            
                          125° C.                                  
ester                                                                     
N-(α-Cyano-3-chlorobenzyl)-N-methylcarbami-                         
                          M.P.:                                           
nic acid-[3-(2-propinyloxycarbonylamino)-                                 
                          100-103° C.                              
phenyl]-ester                                                             
N-(1-Cyano-2-phenylethyl)-N-methylcarbami-                                
                          M.P.:                                           
nic acid-[3-(ethylthiocarbonylamino)-phenyl]-                             
                          112° C.                                  
ester                                                                     
N-(1-Cyano-2-phenylpropyl)-N-methylcar-                                   
                          n.sub.D 20:                                     
baminic acid-[3-(2-methylpropoxycarbonyl-                                 
                          1,5271                                          
amino)-phenyl]-ester                                                      
______________________________________                                    
 
    
     These compounds are soluble in acetone, cyclohexanone, ethyl acetate, isophorone, ether and tetrahydrofuran and practically insoluble in water and light gasoline. 
     The compounds used as starting material for the inventive compounds can be prepared according to known methods; for example, from the corresponding aldehyde, potassium cyanide and the hydrochloride of the corresponding amine. 
     The following examples serve to illustrate the possibilities for use of the inventive diurethanes and to show the exceptional selective herbicidal properties of the compounds. 
     EXAMPLE 2 
     In a greenhouse the compounds listed in the table were applied, at an application rate of 5 kg active agent/ha, dissolved in 500 liters water/ha, on mustard and tomato plants in post-emergence tests. 
     Three weeks after the treatment the results are determined, whereby 
     0=no effect and 
     4=total damage to the plants. 
     As can be seen from the table, as a rule a destruction of the test plants was achieved. 
     
         ______________________________________                                    
                                  So-                                     
                           Bras-  lan-                                    
Compound of the Invention  sica-  um                                      
______________________________________                                    
α-Cyanobenzyl-carbaminic acid-[3-(methoxy-                          
carbonylamino)-phenyl]-ester                                              
                           4      4                                       
α-Cyanobenzyl-carbaminic acid-[3-(ethoxy-                           
carbonylamino)-phenyl]-ester                                              
                           4      4                                       
α-Cyanobenzyl-carbaminic acid-[3-(methyl-                           
thiocarbonylamino)-phenyl]-ester                                          
                           4      4                                       
α-Cyanobenzyl-carbaminic acid-[3-(ethylthio-                        
carbonylamino)-phenyl]-ester                                              
                           4      4                                       
α-Cyanobenzyl-carbaminic acid-[3-(1-methyl-                         
ethoxycarbonylamino)-phenyl]-ester                                        
                           4      4                                       
α-Cyanobenzyl-carbaminic acid-[3-(2-methyl-                         
propoxycarbonylamino)-phenyl]-ester                                       
                           4      4                                       
α-Cyanobenzyl-carbaminic acid-[3-(1-methyl-                         
propoxycarbonylamino)-phenyl]-ester                                       
                           4      4                                       
α-Cyanobenzyl-N-butyl-carbaminic acid-[3-                           
(methylthio-carbonylamino)-phenyl]-ester                                  
                           4      4                                       
α-Cyanobenzyl-N-(2-methylpropyl)-carbaminic                         
acid-[ 3-(methoxycarbonylamino)-phenyl]-ester                             
                           4      4                                       
α-Cyanobenzyl-N-(2-methylpropyl)-carbaminic                         
acid-[3-(methylthio-carbonylamino)-phenyl]-ester                          
                           4      4                                       
α-Cyanobenzyl-N-butyl-carbaminic acid-[3-(2-                        
methylpropoxycarbonylamino)-phenyl]-ester                                 
                           4      4                                       
α-Cyanobenzyl-N-butyl-carbaminic acid-[(1-                          
methylpropoxycarbonylamino)-phenyl]-ester                                 
                           4      4                                       
α-Cyanobenzyl-N-(2-methylpropyl)-carbaminic acid-                   
[3-(2-methylpropoxycarbonylamino)-phenyl]-ester                           
                           4      4                                       
α-Cyanobenzyl-N-butyl-carbaminic acid-[3-(allyl-                    
oxycarbonylamino)-phenyl]-ester                                           
                           4      4                                       
α-Cyanobenzyl-N-butyl-carbaminic acid-[3-                           
(methoxycarbonylamino)-phenyl]-ester                                      
                           4      4                                       
α-Cyanobenzyl-N-butyl-carbaminic acid-[3-                           
(ethoxycarbonylamino)-phenyl]-ester                                       
                           4      4                                       
α-Cyanobenzyl-N-methyl-carbaminic acid-[3-                          
(methoxycarbonylamino)-phenyl]-ester                                      
                           4      4                                       
α-Cyanobenzyl-N-methyl-carbaminic acid-[3-                          
(allyloxycarbonylamino)-phenyl]-ester                                     
                           4      4                                       
α-Cyanobenzyl-N-methyl-carbaminic acid-[3-                          
(2-methylpropoxycarbonylamino)-phenyl]-ester                              
                           4      4                                       
α-Cyanobenzyl-N-ethyl-carbaminic acid-[3-                           
(allyloxycarbonylamino)-phenyl]  -ester                                   
                           4      4                                       
α-Cyanobenzyl-N-methylcarbaminic acid-[3-                           
(ethoxycarbonylamino)-phenyl]-ester                                       
                           4      4                                       
α-Cyanobenzyl-N-methyl-carbaminic acid-[3-                          
(ethylthiocarbonylamino)-phenyl]-ester                                    
                           4      4                                       
α-Cyanobenzyl-N-ethyl-carbaminic acid-[3-                           
(ethoxycarbonylamino)-phenyl]-ester                                       
                           4      4                                       
α-Cyanobenzyl-N-ethyl-carbaminic acid-[3-                           
(ethylthiocarbonylamino)-phenyl]-ester                                    
                           4      4                                       
α-Cyanobenzyl-N-ethyl-carbaminic acid-[ 3-(2-                       
methylpropoxycarbonylamino)-phenyl]-ester                                 
                           4      4                                       
α-Cyanobenzyl-N-ethyl-carbaminic acid-[3-                           
(methylthiocarbonylamino)-phenyl]-ester                                   
                           4      4                                       
α-Cyanobenzyl-N-allyl-carbaminic acid-[3-                           
(methoxycarbonylamino)-phenyl]-ester                                      
                           4      4                                       
α-Cyanobenzyl-N-allyl-carbaminic acid-[3-                           
(ethoxycarbonylamino)-phenyl]-ester                                       
                           4      4                                       
α-Cyanobenzyl-N-allyl-carbaminic acid-[3-                           
(ethylthiocarbonylamino)-phenyl]-ester                                    
                           4      4                                       
α-Cyanobenzyl-N-allyl-carbaminic acid-[3-                           
allyloxycarbonylamino)-phenyl]-ester                                      
                           4      4                                       
N-(α-Cyanobenzyl)-N-allyl-carbaminic acid-[3-                       
(2-propinyloxycarbonylamino)-phenyl]-ester                                
                           4      4                                       
N-(α-Cyanobenzyl)-N-ethyl-carbaminic-[3-                            
(2-propinyloxycarbonylamino)-phenyl]-ester                                
                           4      4                                       
N-(α-Cyano-4-methylbenzyl)-N-ethyl-carbaminic                       
acid-[3-(methoxycarbonylamino)-phenyl]-ester                              
                           4      4                                       
N-(α-Cyano-4-methylbenzyl)-N-ethyl-carbaminic                       
acid-[3-(ethoxycarbonylamino)-phenyl]-ester                               
                           4      4                                       
N-(α-Cyano-4-methylbenzyl)-N-ethyl-carbaminic                       
acid-[3-(ethylthiocarbonylamino)-phenyl]-ester                            
                           4      4                                       
N-(α-Cyano-4-methylbenzyl)-N-ethyl-carbaminic                       
acid-[3-(1-methylethoxycarbonylamino)-phenyl]-                            
ester                      4      4                                       
N-(α-Cyano-4-methylbenzyl)-N-ethyl-carbaminic                       
acid-[3-(allyloxycarbonylamino)-phenyl]-ester                             
                           4      4                                       
N-(α-Cyano-4-methylbenzyl)-N-ethyl-carbaminic                       
acid-[3-(2-methylpropoxycarbonylamino)-phenyl]-                           
ester                      4      4                                       
N-(α-Cyano-4-methylbenzyl)-N-ethyl-carbaminic                       
acid-[3-(2-propinyloxycarbonylamino)-phenyl]-ester                        
                           4      4                                       
N-(α-Cyano-3-methylbenzyl)-N-ethyl-carbaminic                       
acid-[3-(methoxycarbonylamino)-phenyl]-ester                              
                           4      4                                       
N-(α-Cyano-3-methylbenzyl)-N-ethyl-carbaminic                       
acid-[3-(ethoxycarbonylamino)-phenyl]-ester                               
                           4      4                                       
N-(α-Cyano-3-methylbenzyl)-N-ethyl-carbaminic                       
acid-[3-(2-propinyloxycarbonylamino)-phenyl]-ester                        
                           4      4                                       
N-(α-Cyanobenzyl)-N-methyl-carbaminic acid-[3-(1-                   
methylethoxycarbonylamino)-phenyl]-ester                                  
                           4      4                                       
N-(α-Cyano-3-methylbenzyl)-N-ethylcarbaminic                        
acid-[3-(allyloxycarbonylamino)-phenyl]-ester                             
                           4      4                                       
N-(α-Cyano-3-methylbenzyl)-N-ethylcarbaminic                        
acid-[3-ethylthiocarbonylamino)-phenyl]-ester                             
                           4      4                                       
N-(α-Cyano-3-methylbenzyl)-N-ethyl-carbaminic                       
acid-[3-(1-methylethoxycarbonylamino)-phenyl]-ester                       
                           4      4                                       
N-(α-Cyano-3-methylbenzyl)-N-ethyl-carbaminic                       
acid-[3-(2-methylpropoxycarbonylamino)-phenyl]-                           
ester                      4      4                                       
N-(α-Cyanobenzyl)-N-methyl-carbaminic acid-[3-(2-                   
propinyloxycarbonylamino)-phenyl]-ester                                   
                           4      4                                       
N-(α-Cyanobenzyl)-N-methyl-carbaminic acid-[3-(1-                   
methylpropoxycarbonylamino)-phenyl]-ester                                 
                           4      4                                       
N-(α-Cyanobenzyl)-N-ethyl-carbaminic acid-[3-(1-                    
methylethoxycarbonylamino)-phenyl]-ester                                  
                           4      4                                       
N-(α-Cyano-4-methoxybenzyl)-N-ethyl-carbaminic                      
acid-[3-(ethoxycarbonylamino)-phenyl]-ester                               
                           4      4                                       
N-(α-Cyano-4-methoxybenzyl)-N-ethyl-carbaminic                      
acid-[3-(ethylthiocarbonylamino)-phenyl]-ester                            
                           4      4                                       
N-(α-Cyano-4-methoxybenzyl)-N-ethyl-carbaminic                      
acid-[3-(1-methylethoxycarbonylamino)-phenyl]-ester                       
                           4      4                                       
N-(α-Cyano-4-methoxybenzyl)-N-ethyl-carbaminic                      
acid-[3-(2-methylpropoxycarbonylamino)-phenyl]-                           
ester                      4      4                                       
N-(α-Cyano-4-methoxybenzyl)-N-ethyl-carbaminic                      
acid-[3-(2-propinyloxycarbonylamino)-phenyl]-ester                        
                           4      4                                       
N-(α-Cyano-4-methoxybenzyl)-N-ethyl-carbaminic                      
acid-[3-(methylthiocarbonylamino)-phenyl]-ester                           
                           4      4                                       
N-(α-Cyano-4-methoxybenzyl)-N-ethyl-carbaminic                      
acid-[3-(methylthiocarbonylamino)-phenyl]-ester                           
                           4      4                                       
N-(α-Cyano-4-chlorobenzyl)-N-ethyl-carbaminic                       
acid-[3-(methoxycarbonylamino)-phenyl]-ester                              
                           4      4                                       
N-(α-Cyano-4-chlorobenzyl)-N-ethyl-carbaminic                       
acid-[3-(methylthiocarbonylamino)-phenyl]-ester                           
                           4      4                                       
N-(α-Cyano-4-chlorobenzyl)-N-ethyl-carbaminic                       
acid-[3-(ethoxycarbonylamino)-phenyl]-ester                               
                           4      4                                       
N-(α-Cyano-4-chlorobenzyl)-N-ethyl-carbaminic                       
acid-[3-(allyloxycarbonylamino)-phenyl]-ester                             
                           4      4                                       
N-(α-Cyano-4-chlorobenzyl)-N-ethyl-carbaminic                       
acid-[3-(ethylthiocarbonylamino)-phenyl]-ester                            
                           4      4                                       
N-(α-Cyano-4-chlorobenzyl)-N-ethyl-carbaminic                       
acid-[3-(methoxycarbonylamino)-phenyl]-ester                              
                           4      4                                       
N-(α-Cyano-benzyl)-N-ethyl-carbaminic acid-[3-                      
(methoxycarbonylamino)-phenyl]-ester                                      
                           4      4                                       
N-(α-Cyano-benzyl)-N-ethyl-carbaminic acid-[3-                      
(1-methylpropoxycarbonylamino)-phenyl]-ester                              
                           4      4                                       
N-(α-Cyano-benzyl)-N-allyl-carbaminic acid-[3-                      
(1-methylethoxycarbonylamino)-phenyl]-ester                               
                           4      4                                       
N-(α-Cyano-benzyl)-N-allyl-carbaminic acid-[3-                      
(2-methylpropoxycarbonylamino)-phenyl]-ester                              
                           4      4                                       
N-(α-Cyano-3,4-dichlorobenzyl)-N-ethyl-carbaminic                   
acid-[3-(2-methylpropoxycarbonylamino)-phenyl]-                           
ester                      4      4                                       
N-(α-Cyano-3-chloro-benzyl)-N-ethyl-carbaminic                      
acid-[3-(1-methylethoxycarbonylamino)-phenyl]-ester                       
                           4      4                                       
N-(α-Cyano-cyclohexyl-methyl)-N-methyl-carbamin-                    
ic acid-[3-(methoxycarbonylamino)-phenyl]-ester                           
                           4      4                                       
N-(α-Cyano-cyclohexylmethyl)-N-methyl-carbaminic                    
acid-[3-(ethylthiocarbonylamino)-phenyl]-ester                            
                           4      4                                       
N-(α-Cyano-cyclohexylmethyl)-N-methylcarbaminic                     
acid-[3-(2-methylpropoxycarbonylamino)-phenyl]                            
ester                      4      4                                       
N-(α-Cyano-3-methoxybenzyl)-N-methyl-carbaminic                     
acid-[3-(methylthiocarbonylamino)-phenyl]-ester                           
                           4      4                                       
N-(α-Cyano-3-methoxy-benzyl-N-methylcarbaminic                      
acid-[3-(allyloxycarbonylamino)-phenyl]-ester                             
                           4      4                                       
N-(α-Cyano-3-methoxy-benzyl)-N-methylcarbaminic                     
acid-[3-(2-propinyloxycarbonylamino)-phenyl]-ester                        
                           4      4                                       
N-(α-Cyano-3-methoxy-benzyl)-N-methylcarbanilic                     
acid-[3-(2-methylpropoxycarbonylamino)-phenyl]-                           
ester                      4      4                                       
N-(1-Cyano-2-phenyl-ethyl)-N-methyl-carbaminic                            
acid-[3-(2-propinyloxycarbonylamino)-phenyl]-ester                        
                           4      4                                       
N-(α-Cyano-3,4-dichlorobenzyl)-N-ethyl-carbaminic                   
acid-[3-(methoxycarbonylamino)-phenyl]-ester                              
                           4      4                                       
N-(α-Cyano-3-chlorobenzyl)-N-ethyl-carbaminic                       
acid-[3-(methoxycarbonylamino)-phenyl]-ester                              
                           4      4                                       
N-(α-Cyano-3-methoxy-benzyl)-N-methylcarbaminic                     
acid-[3-(methoxycarbonylamino)-phenyl]-ester                              
                           4      4                                       
N-(1-Cyano-2-phenyl-ethyl)-N-methylcarbaminic                             
acid-[3-(methoxycarbonylamino)-phenyl]-ester                              
                           4      4                                       
N-(α-Cyanobenzyl)-N-ethyl-carbaminic acid-[3-(4-                    
chloro-2-butinyloxycarbonylamino)-phenyl]-ester                           
                           4      4                                       
N-(1-Cyano-2-phenyl-ethyl)-N-methyl-carbaminic                            
acid-[3-(allyloxycarbonylamino)-phenyl]-ester                             
                           4      4                                       
N-(α-Cyano-2,6-dichlorobenzyl)-N-methylcarbaminic                   
acid-[3-(methoxycarbonylamino)-phenyl]-ester                              
                           4      4                                       
N-(α-Cyano-2,6-dichlorobenzyl)-N-methylcarbaminic                   
acid-[3-(methylthiocarbonylamino)-phenyl]-ester                           
                           4      4                                       
N-(α-Cyano-2,6-dichlorobenzyl)-N-methylcarbaminic                   
acid-[3-(2-propinyloxycarbonylamino)-phenyl]-ester                        
                           4      4                                       
N-(1-Cyano-2-phenyl-ethyl)-N-methyl-carbaminic                            
acid-[3-(methylthiocarbonylamino)-phenyl]-ester                           
                           4      4                                       
N-(α-Cyano-2,6-dichlorobenzyl)-N-methylcarbaminic                   
acid-[3-(allyloxycarbonylamino)-phenyl]-ester                             
                           4      4                                       
N-(α-Cyano-2,4-dichlorobenzyl)-N-methylcarbaminic                   
acid-[3-(methoxycarbonylamino)-phenyl]-ester                              
                           4      4                                       
N-(α-Cyano-2,4-dichlorobenzyl)-N-methylcarbaminic                   
acid-[3-(methylthiocarbonylamino)-phenyl]-ester                           
                           4      4                                       
N-(α-Cyano-2,4-dichlorobenzyl)-N-methyl-carbaminic                  
acid-[3-(allyloxycarbonylamino)-phenyl]-ester                             
                           4      4                                       
N-(α-Cyano-2,4-dichlorobenzyl)-N-methyl-carbaminic                  
acid-[3-(2-propinyloxycarbonylamino)-phenyl]-ester                        
                           4      4                                       
N-(α-Cyano-3-chlorobenzyl)-N-ethylcarbaminic acid-                  
[3-(allyloxycarbonylamino)-phenyl]-ester                                  
                           4      4                                       
N-(α-Cyano-3-chlorobenzyl)-N-ethylcarbaminic acid-                  
[3-(2-propinyloxycarbonylamino)-phenyl]-ester                             
                           4      4                                       
N-(α-Cyano-3-chlorobenzyl)-N-ethylcarbaminic acid-                  
[3-(methylthiocarbonylamino)-phenyl]-ester                                
                           4      4                                       
N-(1-Cyano-2-phenyl-propyl)-N-methylcarbaminic                            
acid-[3-(ethoxycarbonylamino)-phenyl]-ester                               
                           4      4                                       
N-(1-Cyano-2-phenyl-propyl)-N-methyl-carbaminic                           
acid-[3-(methylthiocarbonylamino)-phenyl]-ester                           
                           4      4                                       
N-(α-Cyano-3-chlorobenzyl)-N-ethylcarbaminic acid-                  
3-(ethoxycarbonylamino)-phenyl-ester                                      
                           4      4                                       
N-(α-Cyano-3,4-dichlorobenzyl)-N-methylcarbaminic                   
acid-3-(methoxycarbonylamino)-phenylester                                 
                           4      4                                       
N-(α-Cyano-3,4-dichlorobenzyl)-N-methylcarbaminic                   
acid-3-(ethoxycarbonylamino)-phenylester                                  
                           4      4                                       
N-(α-Cyano-3,4-dichlorobenzyl)-N-methylcarbaminic                   
acid-3-(methylthiocarbonylamino)-phenylester                              
                           4      4                                       
N-(α-Cyano-3,4-dichlorobenzyl)-N-methylcarbaminic                   
acid-3-(allyloxycarbonylamino)-phenylester                                
                           4      4                                       
N-(α-Cyano-3,4-dichlorobenzyl)-N-methylcarbaminic                   
acid-3-(2-propinyloxycarbonylamino)-phenylester                           
                           4      4                                       
N-(1-Cyano-2-phenylpropyl)-N-methylcarbaminic                             
acid-3-(2-propinyloxycarbonylamino)-phenylester                           
                           4      4                                       
N-(1-Cyano-2-phenylpropyl)-N-methylcarbaminic                             
acid-3-(allyloxycarbonylamino)-phenylester                                
                           4      4                                       
N-(1-Cyano-2-phenylpropyl)-N-methylcarbaminic                             
acid-3-(ethylthiocarbonylamino)-phenylester                               
                           4      4                                       
N-(α-Cyano-3-chlorobenzyl)-N-methylcarbaminic                       
acid-3-(methoxycarbonylamino)-phenylester                                 
                           4      4                                       
Untreated                  0      0                                       
______________________________________                                    
 
    
     
         ______________________________________                                    
Supplement to Example 2                                                   
                                  So-                                     
                           Bras-  lan-                                    
Compound of the Invention  sica   um                                      
______________________________________                                    
N-(1-Cyano-2-phenylpropyl)-N-methylcarbaminic                             
acid-[3-(1-methylethoxycarbonylamino)-                                    
phenyl]-ester              4      4                                       
N-(α-Cyano-3-chlorobenzyl)-N-methylcarbaminic                       
acid-[3-(ethoxycarbonylamino)-phenyl]-ester                               
                           4      4                                       
N-(α-Cyano-3-chlorobenzyl)-N-methylcarbaminic                       
acid-[3-(methylthiocarbonylamino)-phenyl]-ester                           
                           4      4                                       
N-(α-Cyano-3-chlorobenzyl)-N-methylcarbaminic                       
acid-[3-(ethylthiocarbonylamino)-phenyl]-ester                            
                           4      4                                       
N-(α-Cyano-3-chlorobenzyl)-N-methylcarbaminic                       
acid-[3-(1-methylethoxycarbonylamino)-phenyl]-ester                       
                           4      4                                       
N-(α-Cyano-3-chlorobenzyl)-N-methylcarbaminic                       
acid-[3-(allyloxycarbonylamino)-phenyl]-ester                             
                           4      4                                       
N-(α-Cyano-3-chlorobenzyl)-N-methylcarbaminic                       
acid-[3-(2-propinyloxycarbonylamino)-phenyl]-ester                        
                           4      4                                       
N-(1-Cyano-2-phenylethyl)-N-methylcarbaminic                              
acid-[3-(ethylthiocarbonylamino)-phenyl]-ester                            
                           4      4                                       
______________________________________                                    
 
    
     EXAMPLE 3 
     In a greenhouse the plants were treated post-emergently with the listed agents in an application amount of 1 kg active agent/ha. The agent was to this end sprayed uniformly over the plants. The compounds of the invention show after 3 weeks a high selectivity with a simultaneous effectiveness against the weeds. The comparison agent does not show this selectivity. In the table, 10=no damage and 0=total destruction. 
     
         __________________________________________________________________________
                                      A-    Ma-                           
                Su-                   ma-   tri-                          
                                               La-    I- So-              
                gar                                                       
                   Cot-                                                   
                      Pea-                                                
                         Bush                                             
                             Pota-                                        
                                Al-   ran-                                
                                         Stel-                            
                                            car-                          
                                               mi-                        
                                                  Cent-                   
                                                      po-                 
                                                         lan-             
                                                            Bras-         
Compound of the Invention                                                 
                beets                                                     
                   ton                                                    
                      nut                                                 
                         beans                                            
                             toes                                         
                                falfa                                     
                                   Rice                                   
                                      thus                                
                                         laria                            
                                            ia um aurea                   
                                                      mea                 
                                                         um sica          
__________________________________________________________________________
α-Cyanobenzyl-N-methyl-                                             
carbaminic                                                                
acid-[3-(methoxycarbonylamino)-                                           
phenyl]-ester   -- 10 10 10  10 10 10 0  0  3  0  0   0  0  0             
α-Cyanobenzyl-N-methyl-                                             
carbaminic                                                                
acid-[3-(ethoxycarbonylamino)-                                            
phenyl]-ester   -- 10 10 10  10 10 10 0  0  0  0  0   0  0  0             
α-Cyanobenzyl-N-methyl-                                             
carbaminic                                                                
acid-[3-(ethoxycarbonylamino)-                                            
phenyl]-ester   -- 10 10 10  10 10 10 0  0  0  0  0   0  0  0             
α-Cyanobenzyl-N-ethyl-                                              
carbaminic                                                                
acid-[3-(ethoxycarbonylamino)-                                            
phenyl]-ester   -- 10 10 10  10 10 10 0  0  0  0  0   0  0  0             
α-Cyanobenzyl-N-ethyl-                                              
carbaminic                                                                
acid-[3-(ethylthiocarbonylamino)-                                         
phenyl]-ester   -- 10 10 10  10 10 10 0  0  0  0  0   0  0  0             
A-Cyanobenzyl-N-ethyl-                                                    
carbaminic acid-                                                          
[3-(methylthiocarbonylamino)-                                             
phenyl]-ester   -- 10 10 10  10 10 10 0  0  0  0  0   0  0  0             
N-(α-Cyano-4-chlorobenzyl)-N-                                       
ethyl-carbaminic                                                          
acid-[3-(methoxycarbonyl-                                                 
amino)-phenyl]-ester                                                      
                -- 10 10 10  10 10 10 0  0  0  0  0   0  0  0             
N-(α-Cyano-4-chlorobenzyl)-N-                                       
ethyl-carbaminic                                                          
acid-[3-(ethoxycarbonyl-                                                  
amino)-phenyl]-ester                                                      
                -- 10 10 10  10 10 10 0  0  0  0  0   0  0  0             
N-(α-Cyano-benzyl)-N-ethyl-                                         
carbaminic                                                                
acid-[3-(methoxycarbonyl-                                                 
amino)-phenyl]-ester                                                      
                -- 10 10 10  10 10 10 0  0  0  0  0   0  0  0             
N-(α-Cyano-cyclohexyl-methyl)-                                      
N-methyl-carbaminic acid-[3-                                              
methoxycarbonylamino)-phenyl]-                                            
ester           10 10 10 10  10 10 10 0  0  0  0  0   0  0  0             
N-(α-Cyano-cyclohexylmethyl-                                        
N-methyl-carbaminic acid-[3-                                              
(ethylthiocarbonylamino)-phenyl]-                                         
ester           10 10 10 10  10 10 10 0  0  0  0  0   0  0  0             
N-(α-Cyano-cyclohexylmethyl)-                                       
N-methylcarbaminic acid-[3-(2-                                            
methyl-                                                                   
propoxycarbonylamino)-phenyl]-                                            
ester           10 10 10 10  10 10 10 0  0  0  0  0   0  0  0             
Comparison Agent                                                          
(from DE-PS 1 567 151)                                                    
3-Methoxycarbonylamino-                                                   
phenyl-N-                                                                 
(3-methyl-phenyl)-carbamate                                               
                10 5  9  4   8  4  9  8  0  3  0  0   0  0  0             
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     Without further analysis, the foregoing will so fully reveal the gist of the present invention that others can, by applying current knowledge, readily adapt it for various applications without omitting features that, from the standpoint of prior art, fairly constitute essential characteristics of the generic or specific aspects of this invention.