1,2,4-Thiadiazolylureas. A postcript to the oxidative cyclisation of thionoamidines
Abstract
The identity of authentic 5-phenyl-3-ureido-1,2,4-thiadiazole synthesized from the pre-formed heterocycle, and of the product of the oxidative cyclisation of N1-carbamoyl-N3-thiobenzoylguanidine, confirms the structure of 5-substituted-3-ureido-1,2,4-thiadiazoles obtained by either route.