Tetrahedron p. 1673 - 1676 (1982)
Update date:2022-08-05
Topics:
Rajappa, S.
Nair, M. D.
Sreenivasan, R.
Advani, B. G.
A novel C-thioacylation reaction is described.Reaction of aromatic or heterocyclic aldehydes with 1-alkyl-2-methyl-1,4,5,6-tetrahydropyrimidine or 1-alkyl-2-methylimidazolidine in the presence of sulphur leads to the thioacylketeneaminals 6,10 or 12 in low to moderate yields.The structure of 6e was proved by S-methylation to 7e and acid-hydrolysis to the known 8e.Oxidative cyclization of 6 leads to the isothiazolo(2,3-a) pyrimidinium salts 13.
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