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Updated: Mar 10, 2026

Facile Preparation of 2Z,4E-Dienamides by the Olefination of Electron-deficient Alkenes with Allyl Acetate
Published on: June 21, 2017
Cu(II)-Catalyzed 6π-Photocyclization of Dienynes
Ruiwen Jin1, Jinjin Chen2, Yiyong Chen1
1Department of Chemistry, Fudan University , 220 Handan Road, Shanghai 200433, P. R. China.
Abstract:
The first 6π-photocyclization of dienynes was developed, which provides a new and effective protocol for the synthesis of the phenyl ring in excellent yields with nice functional group tolerance. In this transformation, the Cu(OTf)2 catalyst plays a key role in the conversion of alkyne moiety into an alkene-type moiety, which means that the dienyne reactant is converted into a triene-type substrate. Thus, this reaction proceeds via a Cu(II)-catalyzed 6π-photocyclization of triene-type derivatives.
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