化学
亚甲基
药物化学
丙二腈
乙酰乙酸乙酯
双环分子
作者
Saoud A. Metwally,G. M. El-Naggar,Talaat I. El-Emary
标识
DOI:10.1002/jlac.1991199101164
摘要
The reaction of some active methylene compounds with 4-(dicyanomethylene)-3-methyl-1-phenyl-2-pyrazoline-5-one (1a) has been investigated. This reaction involves a Michael addition to afford 4-spirocyclobutenes 3 or cyclopyran-2-pyrazoline-5-ones 4, depending on the active methylene derivatives used. A possible rationalization of the reaction pathway is proposed.
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