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Updated: Mar 3, 2026

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Catalytic Annulation of Diethyl Methylenecyclopropane-1,1-dicarboxylate with 1,1-Dicyanoalkenes
Itaru Suzuki1, Shinji Tsunoi1, Ikuya Shibata1
1Research Center for Environmental Preservation, Osaka University , 2-4 Yamadaoka, Suita, Osaka 565-0871, Japan.
Abstract:
The catalytic annulation of methylenecyclopropane 1 with 1,1-dicyanoalkenes 2 using a Mg-Sn catalytic system was developed. Selective formation of cyclopentylidenemalonates 3 and spiro[2,3]hexane-1,1-dicarboxylates 4 was accomplished via the choice of a proper solvent and an effective catalytic system.
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