Unique catalytic effect of a cyclodextrin host on photodimerization of coumarin in nonpolar solvents
2013
Asahara, Haruyasu | Iwamoto, Takuya | Kida, Toshiyuki | Akashi, M. (Mitsuru)
Heptakis(6-O-tert-butyldimethylsilyl)-β-cyclodextrin (TBDMS-β-CD) formed inclusion complexes with coumarin in benzene and cyclohexane. The inclusion mode of coumarin within the TBDMS-β-CD cavity was different between these solvents. Photodimerization of coumarin in the solvents was remarkably accelerated by the inclusion within the TBDMS-β-CD cavity. In particular, the largest rate increase was observed when 1.0equiv of TBDMS-β-CD was added to coumarin.
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