Photocyclization reactions. Part 1. Synthesis of dihydrobenzofuranols using photocyclization of 2??alkoxybenzaldehydes, 2′??alkoxyacetophenones, 2?? …

T Horaguchi, C Tsukada, E Hasegawa…

Index: Horaguchi, Takaaki; Tsukada, Chikara; Hasegawa, Eietsu; Shimizu, Takahachi; Suzuki, Tsuneo; Tanemura, Kiyoshi Journal of Heterocyclic Chemistry, 1991 , vol. 28, # 5 p. 1261 - 1272

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Citation Number: 20

Abstract

Abstract Photocyclization reactions were carried out on 2-alkoxybenzaldehydes 1a-f, 2′- alkoxyacetophenones 2a-h, 2-formylphenoxyacetic acids 1i-l and 2-acetylphenoxyacetic acids 2i-m. Irradiation of 1a-f and 2a-h in acetonitrile gave the corresponding dihydrobenzofuranols 3, 5 and dihydroisobenzofuranols 4, 6. Using carboxylic acids 1i-1, 2i- m as starting materials, decarboxylation occurred immediately to give the corresponding ...