Studies on the N-Oxides of π-Deficient N-Heteroaromatics. XXXIV. A Novel Synthesis of Substituted Indoles by Photochemical Ring Contraction of 3, 1- …

C Kaneko, H Fujii, S Kawai…

Index: Kaneko; Fujii; Kawai; et al. Chemical and Pharmaceutical Bulletin, 1980 , vol. 28, # 4 p. 1157 - 1171

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Citation Number: 7

Abstract

抄録: A novel photochemical ring-contraction reaction of 5-unsubstituted 3, 1- benzoxazepines and their 5-halogeno or carboxyl derivatives to yield 3-formylindoles in an aprotic solvent is reported. This ring contraction was successfully extended to oxazepines having an alkoxycarbonyl function at the 5-position to give the indoles having this function at the 3-position. Though most of the oxazepines underwent the ring-contraction reaction ...