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

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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