GAS-CHROMATOGRAPHIC IDENTIFICATION OF PHENYLALKANES AND BICYCLIC HYDROCARBONS.
Abstract Retention indices and their temperature coefficients have been measured with Silicone Oil DC 710 and Emulphor O as liquid phases. Some experimental rules are put forward.
A system of standard retention indices and its uses the characterisation of stationary phases and the prediction of retention indices
Abstract A method for the calculation of “standard” retention indices from boiling point data has been proposed. The uses of standard retention indices and standard retention index differences for the characterisation of stationary phases and the prediction of retention indices on any stationary phase at any temperature have been discussed. A “cyclic” effect on retention data has been found on squalane and SE-30.
Highly enantio- and diastereoselective synthesis of β-methyl-γ-monofluoromethyl-substituted alcohols.
Enanatiopure β-methyl-γ-monofluoromethyl alcohols were prepared from the allylic alkylation between fluorobis(phenylsulfonyl)methane with Morita-Baylis-Hillman carbonates. The reaction was catalyzed by using the Cinchona alkaloid derivative, (DHQD)(2)AQN. The origin of the stereoselectivity was verified by DFT methods. Calculated geometries and relative energies of various transition states strongly support the observed stereoselectivity.