ChemInform Abstract: Novel Benzoyl Migration of the Intermediary 1:1 Adducts of 1,3-Dipolar Cycloaddition of Thiazolo(3,2-b) (1,2,4)triazolium N-Phenacylides with Dimethyl Acetylenedicarboxylate

Reaction of thiazolo[3,2- b ][1,2,4]triazolium N -phenacylides 3 with dimethyl acetylene-dicarboxylate gave novel compounds, 2-(1 H -pyrrolo[2,1- c ]-1,2,4-triazolyl)ethenyl thiobenzoates 4 and 2-[2-(1 H -pyrrolo[2,1- c ]-1,2,4-triazolyl)ethenylthio]propenoates 5 . The former products 4 would be formed via a new type of intramolecular benzoyl migration of the intermediary 1:1 adducts 6 .