Mh. Elnagdi et Aw. Erian, STUDIES WITH POLYFUNCTIONALLY SUBSTITUTED HETEROCYCLES - SYNTHETIC APPROACHES TO AZINYLCARBONITRILE, Bulletin de la Societe chimique de France, 132(9), 1995, pp. 920-924
Mixtures of acetaldehyde and active methylene reagent reacted with cya
nothioacetamide to yield thiopyran 4 and pyridine thione 10. The pyrid
ine thiones 10 readily reacted with a wide variety of reagents to give
novel heterocyclic systems.