Treatment of enolizable (methy1thio) alkylideniminium salts with active methylene compounds under basic conditions gives Knoevenagel-type adducts in excellent yields. Attempts to convert several of these adducts to vinylogous urethanes and vinylogous amides met with varied success. One-pot preparations of vinylogous urethanea and vinylogous amides from (methy1thio) alkylideni" salts and selected active methylene compounds are ...
