Angewandte Chemie. International edition in English 2014-04-22

A chiral thioxanthone as an organocatalyst for enantioselective [2+2] photocycloaddition reactions induced by visible light.

Rafael Alonso, Thorsten Bach

Index: Angew. Chem. Int. Ed. Engl. 53(17) , 4368-71, (2014)

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Abstract

Thioxanthone 1, which was synthesized in a concise fashion from methyl thiosalicylate, exhibits a significant absorption in the visible light region. It allows for an efficient enantioselective catalysis of intramolecular [2+2] photocycloaddition reactions presumably by triplet energy transfer. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

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