Meso-ionic 1,3,4-thiadiazoles, reaction with methyl azodicarboxylate
Abstract
The reaction of 4,5-diphenyl-1,3,4-thiadiazolium-2-thiolate (I) with methyl azodicarboxylate, previously reported to yield a 6-membered meso-ionic system (III), is here shown to produce an azothiadiazole derivative (IV).