New photochemistry of 2,5-cyclohexadien-1-ones and related compounds

Abstract

New procedures for photorearrangement of 2,5-cyrlohexadien-1- ones to bicyclo[3.1.0]hexenones and substituted phenols have been developed. The intermediate oxyallyl zwitterions undergo intramolecular cycloaddition to furan, the alkyl azide group, and a variety of olefins. Intramolecular 2+2 photocycloadditions of 4-(3‘-alkenyl)-2,5-cyclohexadien-1-ones also are described. © 1988 IUPAC