Tetrahedron Letters

Photocyclization of enol acetates of o-acetoxyacetophenones to chromones

H García, R Martínez-Utrilla, MA Miranda

Index: Garcia, Hermenegildo; Martinez-Utrilla, Roberto; Miranda, Miguel Angel Tetrahedron Letters, 1981 , vol. 22, # 18 p. 1749 - 1750

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Citation Number: 8

Abstract

In a recent paper'we have reported on the formation of chromones by irradiation of o- acetoxyaryl-2 (3H)-furanones 1. In order to establish whether the lactone structure is a prerequisite for cyclization, a benzene solution of the simple en01 ester 2a2- was submitted to irradiation in a quartz immersion well reactor with a medium pressure mercury lamp. Isolation of chromone 3a (20%) she-wed that in fact the lactone structure is not an ...