Copper(I)-Catalyzed [2+2] Photocycloaddition of Nonconjugated Alkenes in Room-Temperature Ionic Liquids

Chanchal K. Malik; Michel Vaultier; Subrata Ghosh

doi:10.1055/s-2007-965971

SPECIALTOPIC

Copper(I)-Catalyzed [2+2] Photocycloaddition of Nonconjugated Alkenes in Room-Temperature Ionic Liquids

Chanchal K. Malik^a,b, Michel Vaultier*^b, Subrata Ghosh*^a
^a Department of Organic Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata, 700 032, India
Fax: +91(33)24732805; e-Mail: ocsg@iacs.res.in;
^b Université de Rennes 1, Institute de Chimie, UMR CNRS 6510, Avenue de General Leclerc, 35042 Rennes, France
e-Mail: michel.vaultier@univ-rennes1.fr;

Abstract

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Abstract

Intra- and intermolecular copper(I)-catalyzed [2+2] photocycloaddition reactions of nonconjugated alkenes can be achieved efficiently in room-temperature ionic liquids such as [tmba][NTf₂]. The ionic liquid can be recovered and recycled. No cycloadduct could be isolated when the same reaction is carried out under identical conditions in [bmim][NTf₂], which undergoes extensive decomposition.

Key words

catalysis - copper - cycloadditions - ionic liquids - photochemistry

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