Selective photodimerisations of coumarin in crystalline inclusion compounds
- 1 January 1992
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Perkin Transactions 1
- No. 8,p. 943-944
- https://doi.org/10.1039/p19920000943
Abstract
Selective photodimerisations of coumarin 1 as the guest in inclusion compounds are reported. For example, irradiation of two 1:1 crystalline inclusions of 1 with (R,R)-(–)-trans-4,5-bis-(hydroxydiphenylmethyl)-2,2-dimethyl-1,3-dioxacyclopentane 8a prepared by recrystallisation of the component from toluene-hexane and ethyl acetate–hexane gave syn-head-to-head 2 and (–)-anti- head -to -head dimer 4 with 96% e.e.Keywords
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