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The stereochemistry of the photocyclisation of acrylanilides to 3,4-dihydroquinolin-2(1H)-ones is controlled almost completely by irradiation in a crystalline inclusion compound with an optically active host compound derived from tartaric acid; the configuration of the photocyclisation product is controlled delicately by two hosts with slightly different structures.
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Tanaka et al. (1992) studied this question.
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