2-Acylamino-3-chloroacrylonitriles, Promising Reagents for Heterocyclization
摘要:
2-Acylamino-3-chloroacrylonitriles prepared by treating available N-(1,2,2-trichloroethyl)am ides of carboxylic acids with sodium cyanide readily undergo cyclization in the presence of excess hydrazine hydrate. The cyclization products, 5-amino-4-acylaminopyrazoles, were applied to the synthesis of new imidazo[4,5-c]pyrazole and pyrazolo[1.5 0]pyrimidine derivatives.
2-Acylamino-3-chloroacrylonitriles, Promising Reagents for Heterocyclization
摘要:
2-Acylamino-3-chloroacrylonitriles prepared by treating available N-(1,2,2-trichloroethyl)am ides of carboxylic acids with sodium cyanide readily undergo cyclization in the presence of excess hydrazine hydrate. The cyclization products, 5-amino-4-acylaminopyrazoles, were applied to the synthesis of new imidazo[4,5-c]pyrazole and pyrazolo[1.5 0]pyrimidine derivatives.