Study of the reactivity of α-acylenaminoketones. Synthesis of pyrazoles
作者:Giuseppina Negri、Concetta Kascheres
DOI:10.1002/jhet.5570380116
日期:2001.1
obtaining substituted pyrazoles and determining which of the carbonyls would preferentially be attacked by the nucleophile. The reactions of compounds 1–4 with hydrazine reagents led to the formation of the pyrazoles 5–7a-q. Small amounts of 4-methylamino-2-pentenones 10a-q, amides 11a-q and pyrazoles 12a-q were also obtained in these reactions. The unexpected formation of pyrazoles 15d,h,q was detected