Abstract
By heating phenyl- and p-nitrophenyl-ω-diazoacetone in ethanol with thiourea, 4-benzyl- and 4-(p-nitrobenzyl)-2-aminothiazole were obtained in a comparatively good yield. In general, the reaction of aryl-ω-diazoacetone and thiourea may be termed a simplified method of the Hantsch's thiazole cyclization.