Russian Chemical Bulletin p. 1909 - 1911 (1997)
Update date:2022-07-29
Topics:
Dyachenko
Krivokolysko
Litvinov
The condensation of acetaldehyde with a twofold excess of cyanothioacetamide and N-methylmorpholine gives N-methylmorpholinium 6-amino-3,5-dicyano-4-methylpyridine-2-thiolate. This compound is also formed by recyclization of 2,6-diamino-3,5-dicyano-4-methyl-4H-thiopyran. From this pyridinethiolate, several substituted 2-alkylthiopyridines and 3,6-diamino-5-cyano-4-methyl-2-methoxycarbonylthieno[2,3-b]pyridine were obtained.
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