Addition–cyclisation of 3-(2-thienyl)acryloyl isothiocyanate with hydrazine derivatives as a source of triazoles and thiadiazoles
作者:Magdy M. Hemdan
DOI:10.3184/030823409x12474221035136
日期:2009.8
3-(2-Thienyl)acryloyl isothiocyanate reacts additively with hydrazine hydrate, phenylhydrazine, 2-pyridyl hydrazine, (thio) semicarbazides, as well as benzoyl- and ethoxycarbonyl hydrazine. Simultaneous or subsequent cyclisation of the resulting 1:1 adducts in acidic or alkaline media yields substituted 1,3,4-thiadiazoles or 1,2,4-triazoles respectively.