Reaction of heterocyclic thioamides with dimethyl acetylenedicarboxylate. Synthesis of novel 2-azolyl-5-methoxycarbonylmethylene thiazolin-4-ones
作者:Vera S Berseneva、Yury Yu Morzherin、Wim Dehaen、Ingrid Luyten、Vasiliy A Bakulev
DOI:10.1016/s0040-4020(01)00049-7
日期:2001.3
A systematic study of the reactions of dimethylacetylenedicarboxylate (DMAD) with heterocyclic thioamides has been carried out and a number of new 2-isoxazolyl-(8), imidazolyl-(13a,b and 17a), 1,2,3-triazolyl-(13d,e) and 1,2,3-thiadiazolyl (17b) thiazolines have been prepared. The higher reactivity of the thioamide group in comparison with the amino group in these reactions has been established.