Cyclization of thioureas from the series of 4-aryl(hetaryl)spinaceamines
摘要:
Reaction of allylthiocarbamoyl fragment of N-allylthioureas with excess bromine or iodine leads to the formation of 5-halomethyldihydrothiazole ring as confirms the dehydroiodination of the 5-(5-iodomethyl-4,5-dihydro-1,3-thiazol-2-yl)-4-phenyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine with the formation of a 5-methylthiazole ring. The reaction of allylthiourea with hydrochloric acid affords a 5-methyldihydrothiazole ring.