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Communication | Regular issue | Vol 34, No. 12, 1992, pp.2239-2242
Published online, 1st January, 1970
DOI: 10.3987/COM-92-6129
Reactions of 5-Cyano-1,4-diphenylpyridazino[4,5-a]indolizines with Dimethyl Acetylenedicarboxylate: Regioselective Formation of 1:2 Michael Type Adducts

Kiyoshi Matsumoto,* Yukio Ikemi, Mitsuo Toda, Takane Uchida, and Akikazu Kakehi

*Graduate School of Human and Environmental Studies, Kyoto University, Kyoto 606-01, Japan

Abstract

Reactions of 5-cyano-1,4-diphenylpyridazino[4,5-a]indolizines with dimethyl acetylenedicarboxylate afforded regioselectively the 1:2 adducts in a Michael fashion rather than in a 1,3-dipolar manner. The structure was established by an X-ray crystallography.