a. Field of the Invention
The invention concerns 1-(isothiazolyl)-1,3,5-triazines, particularly 1-(substituted isothiazolyl)-2-oxo-1,3,5-triazine; for example 1-(3-methyl-5-isothiazolyl)-2-oxo-3,5-dimethylhexahydro-1,3,5-triazine, and the method of controlling weeds, such as jimsonweed with the compositions.
B. Description of the Prior Art
Control of undesirable plants (weeds) by chemicals requires the discovery of compounds which interact with the complex biochemical system of the plant so as to cause death or retardation of plant growth. Only a relatively small amount of the millions of known chemical compounds control weeds.
This is shown by the prior art concerning triazines and isothiazoles for nothing therein suggests or teaches the compositions of this invention or the method of controlling weeds with the compositions of this invention. For example, U.S. Pat. No. 3,563,985 discloses the formation of isothiazoles having an urea, carbamate, or thiocarbamate attached to the 3 or 5 position of the isothiazole ring. U.S. Pat. No. 3,860,593 discloses compounds of substituted thiadiazole substituted triazines such as 1-(5-isopropyl-1,3,4-thiadiazol-2-yl)-3-methyl-5-benzylhexahydro-1,3,5-tri azine-2-one. U.S. Pat. No. 3,849,412 discloses substituted thiadiazol substituted -1,3,5-triazineones, such as 1-(5-isopropyl-1,3,4-thiadiazol-2-yl)-3,5-dimethylhexahydro-1,3,5-triazine -2-one. U.S. Pat. No. 3,705,155 discloses substituted 1-thiadiazoylhexahydro-1,3,5-triazine-2-ones, such as 1-(1,2,4-thiadiazol-5-yl)-3,5-dimethylhexahydro-1,3,5-triazine-2-one. U.S. Pat. No. 3,696,101 discloses substituted tetrahydrobenzothiazolyl-substituted hexahydro-2-triazines, such as 1-(2-[5,5,7-trimethyl]-4,5,6,7-tetrahydrobenzothiazolyl)-2-oxo-3,5-dimethy lhexahydro-1,3,5-triazine. D. H. Clemens et al., Journal of Organic Chemistry, 26, pages 767-769 (1961), describes the reactions of isocyanates and isothiocyanates with azomethines to form triazones and thiotriazones.