The photocyclization of o-alkoxy phenyl ketones

PJ Wagner, MA Meador, BS Park

Index: Wagner, Peter J.; Meador, Michael A.; Park, Bong-Ser Journal of the American Chemical Society, 1990 , vol. 112, # 13 p. 5199 - 5211

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Citation Number: 64

Abstract

Abstract: Several o-alkoxybenzophenones and o-(benzy1oxy) benzophenones and- acetophenones photocyclize to 3-hydroxy-2, 3-dihydrobenzofurans. Quantum yields generally are quite high, except for o-(benzy1oxy) acetophenone. The o-ethoxy and o- benzyloxy ketones form two diastereomeric products, the Z isomer being highly preferred in hydrocarbon solvents, the E isomer being formed in comparable yield in methanol or with ...