The use of aliphatic aldehydes for the synthesis of 4-alkyl-6-amino- 3,5-dicyanopyridine-2(1H)-thiones
作者:N. G. Frolova、V. K. Zav'yalova、V. P. Litvinov
DOI:10.1007/bf01431320
日期:1996.4
The condensation of aliphatic aldehydes with malononitrile and cyanothioacetamide gives 4-alkyl-2,6-diamino-3,5-dicyano-4H-thiopyrans which recyclize into 4-alkyl-6-amino3,5-dicyanopyridine-2(IH)-thiones. The latter are easily S-alkylated with α-haloacetonitriles and α-haloacetophenones.