Bulletin of the Academy of Sciences of the USSR Division of Chemical Science p. 1456 - 1459 (1991)
Update date:2022-08-10
Topics:
Matrosova, S. V.
Zav'yalova, V. K.
Litvinov, V. P.
Sharanin, Yu. A.
The interaction of 2-thienylidene derivatives of malononitrile and cyanothioacetamide with methylene active nitriles gives 2,6-diamino-3,5-dicyano-4-(2-thienyl)-4H-thiopyran which is smoothly recrystallized into 6-amino-3,5-dicyano-4-(2-thienyl)-2(1H)-pyridinethione.The latter is easily alkylated at the sulfur atom by α-halocarbonyl compounds.This reaction was used in the synthesis of 3,6-diamino-4-(2-thienyl)thieno<2,3-b>pyridines.
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