Bulletin of the Chemical Society of Japan

Photochemical reaction of phenyl-substituted 1, 3-diketones

M Yoshioka, T Suzuki, M Oka

Index: Yoshioka; Suzuki; Oka Bulletin of the Chemical Society of Japan, 1984 , vol. 57, # 6 p. 1604 - 1607

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Citation Number: 8

Abstract

Irradiation of 2, 2-dimethyl-1-phenyl-1, 3-diketones with 3-ethyl or 3-isopropyl substituents gave type II cyclization product, 3-hydroxy-2, 2, 4-trimethyl-3-phenylcyclobutanone or 3- hydroxy-2, 2, 4, 4-tetramethyl-3-phenylcyclobutanone, along with type I cleavage products. The type II cyclization/type I cleavage ratio is greater with a 3-isopropyl group than with a 3- ethyl group. A similar irradiation of 2, 2-dimethyl-1-phenyl-1, 3-butanedione gave type I ...

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