87693-83-2Relevant academic research and scientific papers
REACTION OF KETENETHIOACETALS WITH CARBOXAMIDES
Kohra, Shinya,Tominaga, Yoshinori,Matsuda, Yoshiro,Kobayashi, Goro
, p. 1745 - 1750 (2007/10/02)
Reaction of methyl 2-cyano-3,3-bis(methylthio)-acrylate (1a) with carboxamides in the presence of sodium hydride in a mixture of benzene and N,N-dimethylacetamide gave the corresponding displacement products of methylthio group, methyl 3-(N-alkyl or aryl)carbamoyl-2-cyano-3-(methylthio)-acrylates (3a,b,c,d,e,f,g,h).Refluxing of 3 in methanol gave the corresponding cyclized product, 2-alkyl or 2-aryl-5-methoxycarbonyl-6-methylthio-4(3H)-pyrimidones (4).Compound 3a was allowed to react with amine(morpholine, benzylamine, cyclohexylamine, aniline) to give 4-(substituted amino)-4(3H)-pyrimidone derivatives (6a,b,c,d).
