Reaction of alkyl-3-nitropyridinium salts with dimethylformamide diethylacetal

Alkyl-3-nitropyridinium salts react with DMF diethylacetal to give -aminovinyl derivatives under considerably milder conditions than with the corresponding bases. The regioselectivity of this process has been studied in dependence on the structure and positions of the alkyl substituents in the initial salt.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 11, pp. 1488–1494, November, 1993.This work was carried out with a grant from the Russian Fund for Fundamental Research (project # 93-03-4593).