A variety of novel α-cyanoketene S,S-acetals, readily prepared by the reaction of cyanoacetanilides or cyanothioacetamide with carbon disulfide, followed by alkylation, react smoothly with nucleophiles to afford variously substituted methylthio derivatives of pyrrole, pyrazole, pyridine and pyrimidine.
G. H. Elgemeie, A. H. Elghandour, A. M. Elzanate and S. A. Ahmed, J. Chem. Soc., Perkin Trans. 1, 1997, 3285 DOI: 10.1039/A702343J
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