Reactions of 1-lithio-1-phenylthiomethyl- (1a) and 1-lithio-1-methylthiomethyltrimethylsilane (1b) with amides, an ester, acid anhydrides, a urea, and a carbonate are described which provide useful routes to functionalized vinylsulfides. The reaction of 1 with amides gave β-functionalized vinylsulfides, 1-dialkylamino-2-phenylthio (or methylthio)ethylenes, in 40–95% yields and the reaction could