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Updated: Mar 7, 2026

Facile Preparation of 2Z,4E-Dienamides by the Olefination of Electron-deficient Alkenes with Allyl Acetate
Published on: June 21, 2017
[4 + 2] Annulation of Donor-Acceptor Cyclopropanes with Acetylenes Using 1,2-Zwitterionic Reactivity
Roman A Novikov1,2, Anna V Tarasova1, Dmitry A Denisov1
1N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences , 47 Leninsky Prosp., 119991 Moscow, Russian Federation.
Abstract:
A new process for the [4 + 2] annulation of donor-acceptor cyclopropanes with acetylenes under the effect of anhydrous GaCl3 using 1,2-zwitterion reactivity was elaborated. The reaction opens access to substituted dihydronaphthalenes, naphthalenes, and other fused carbocycles. The direction of the reaction can be efficiently controlled by temperature.
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