Synthesis and reactions of S,S-dialkyl trimethylsilyl dithiophosphites

S,S-Dialkyl-O-trimethylsilyl dithiophosphites (III)–(VI) have been obtained by reacting dialkyl dithiochlorophosphites with bis(trimethylsilyl)acetamide. Compounds (III)–(VI) react with aldehydes in the presence of catalytic amounts of tertiary amines to give S,S-dialkyl-1-trimethylsilyloxyalkyldithiophosphonates (VII)–(IX) and (XII). Hydrolysis of (III) and (V) affords dialkyl dithiophosphites (XVI) and (XVII), which readily add to azomethines and chloral.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 9, pp. 2103–2111, September, 1991.