Intramolecular Crossed [2 2] Photocycloaddition through Visible Light-Induced Energy Transfer

Jacs
Intramolecular Crossed [2 2] Photocycloaddition through Visible Light-Induced Energy Transfer: Herein, we present the intramolecular [2+2] cycloadditions of dienones promoted through sensitization, using a polypyridyl iridium(III) catalyst, to form bridged cyclobutanes. In contrast to previous examples of straight [2+2] cycloadditions, these efficient crossed additions were achieved under irradiation with visible light.

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