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Report | Regular issue | Vol 23, No. 5, 1985, pp.1225-1228
Published online, 1st January, 1970
DOI: 10.3987/R-1985-05-1225
Reactivity of Conjugated Enaminothioamides toward Activated Acetylenic Compounds

Serge Coen, Bernard Ragonnet, Catherine Vieillescazes, and Jean-Pierre Roggero*

*Faculté des Sciences, Laboratorie de Chimie Organique, 33, rue Louis Pasteur, 84000 Avignon, France


Conjugated enaminothioamides react in high-yield with acetylenedicarboxylic acid or its ester derivatives to give 2-enaminathiazolin-4-ones. A similar reaction is observed with propiolic acid and derivatives, giving 2-enamino-1,3-thiazin-4-ones. A substituted thiazoline is quantitatively obtained from propargyl bromide.