title: Enantioselective Single-Crystal-to-Single-Crystal Photodimerization of Coumarin and Thiocoumarin in Inclusion Complexes with Chiral Host Compounds.
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.
authors.affiliation: Department of Applied Chemistry, Faculty of Engineering, Ehime University, Matsuyama, Ehime 790-8577 (Japan).
authors.initials: K
authors.lastname: Tanaka
authors.initials: F
authors.lastname: Toda
authors.initials: E
authors.lastname: Mochizuki
authors.initials: N
authors.lastname: Yasui
authors.initials: Y
authors.lastname: Kai
authors.initials: I
authors.lastname: Miyahara
authors.initials: K
authors.lastname: Hirotsu