Reactions of alkyl 3-amino-5-aryl-2-benzoyl-2-oxopent-2-enoates with hydrazine were accompanied by debenzoylation and isomerization to give 3-amino-5-aryl-5-oxopent-3-enohydrazides, which underwent cyclization in the presence of an excess of hydrazine into 5(3)-arylpyrazol-3(5)-ylacetohydrazides.
烷基3-amino-5-aryl-2-benzoyl-2-oxopent-2-enoates与
肼的反应伴随着去苯甲酰化和异构化,生成3-amino-5-aryl-5-oxopent-3-enohydrazides,这些化合物在过量
肼的存在下发生环化,形成5(3)-arylpyrazol-3(5)-ylacetohydrazides。