Volume 38, Issue 23 pp. 3523-3525
Communication

Enantioselective Single-Crystal-to-Single-Crystal Photodimerization of Coumarin and Thiocoumarin in Inclusion Complexes with Chiral Host Compounds

Koichi Tanaka

Koichi Tanaka

Department of Applied Chemistry, Faculty of Engineering, Ehime University, Matsuyama, Ehime 790–8577, Japan, Fax: (+81) 899-927-9923.

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Fumio Toda

Fumio Toda

Department of Applied Chemistry, Faculty of Engineering, Ehime University, Matsuyama, Ehime 790–8577, Japan, Fax: (+81) 899-927-9923.

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Eiko Mochizuki

Eiko Mochizuki

Department of Materials Chemistry, Osaka University, Yamadaoka 2–1, Suita, Osaka 565–0871, Japan

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Nobuyoshi Yasui

Nobuyoshi Yasui

Department of Materials Chemistry, Osaka University, Yamadaoka 2–1, Suita, Osaka 565–0871, Japan

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Yasushi Kai

Yasushi Kai

Department of Materials Chemistry, Osaka University, Yamadaoka 2–1, Suita, Osaka 565–0871, Japan

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Ikuko Miyahara

Ikuko Miyahara

Department of Chemistry, Faculty of Science, Osaka City University, Sugimoto-cho, Sumiyoshi-ku, Osaka 558–8585, Japan

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Ken Hirotsu

Ken Hirotsu

Department of Chemistry, Faculty of Science, Osaka City University, Sugimoto-cho, Sumiyoshi-ku, Osaka 558–8585, Japan

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Abstract

An intermolecular enantioselective photoreaction by a single-crystal-to-single-crystal transformation has been carried out for the first time, as is evident from X-ray structure analysis and X-ray powder diffractometric studies. This reaction, the dimerization of the title compound to cyclobutane derivative 1 (X=O, S), provides a good example for studying the mechanism of topochemical reactions in the crystal.

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