One-pot, three component synthesis of novel 5H-[1,3,4]thiadiazolo[3,2-a]pyrimidine-6-carboxylate derivatives by microwave irradiation

Abstract An efficient one-pot synthetic method for the highly substituted 5 H -[1,3,4]thiadiazolo[3,2- a ]pyrimidine-6-carboxylate derivatives has been accomplished via a microwave irradiation of MCRs of various aldehydes, 2-aminothiadiazole, and acetoacetate without any catalyst in acetic acid. This approach provides a convenient one pot method for the synthesis of 5 H -[1,3,4]thiadiazolo[3,2- a ]pyrimidine-6-carboxylate derivatives.