SYNTHESIS OF NEW KETENEDITHIOACETALS FROM N-CYANOMETHYL-2,2,N-TRIMETHYLPROPIONAMIDE, N-CYANOMETHYL-N-METHYLBENZAMIDE AND 4,4-DIMETHYL-3-OXOPENTANENITRILE AND CARBON-DISULFIDE
W. Dolling, SYNTHESIS OF NEW KETENEDITHIOACETALS FROM N-CYANOMETHYL-2,2,N-TRIMETHYLPROPIONAMIDE, N-CYANOMETHYL-N-METHYLBENZAMIDE AND 4,4-DIMETHYL-3-OXOPENTANENITRILE AND CARBON-DISULFIDE, Phosphorus, sulfur and silicon and the related elements, 86(1-4), 1994, pp. 129-137
N-Cyanomethyl-2,2,N-trimethyl-propionamid (1) and N-cyanomethyl-N-meth
yl-benzamid (4) react with carbon disulfide in dry DMF in the presence
of sodium hydride and alkylating agents as alpha-amino-C-nucleophiles
to afford substituted aminoketene dithioacetals. 4,4-Dimethyl-3-oxo-p
entanenitrile (7) gives under similar conditions the 3,3-bis(alkylthio
)-2-pivaloyl-acrylonitriles which react with N-nucleophiles by substit
ution of one or two methylthio groups.