N-alkylation of some secondary styryl enamides
Abstract
The preparation of some secondary styryl enamides of both the Z- and E-configuration, and their exclusively N-alkylation through their anions is described. Partial configurational inversion is observed under certain conditions during the alkylation of the diastereoisomeric N-(2-phenyl-1-methylethenyl)ethanamides. Two further examples of the photoequilibration of a secondary enamide, and the preparation and N-benzylation of N-(2,2-diphenylethenyl)toluene-p-sulphonamide are also described.