The photochemistry of cyclohexa-2,5-dien-1-ones. Intramolecular cycloaddition of a furan to an intermediate oxyallyl zwitterion
Abstract
Photorearrangement of 4-furfuryloxy-2,4,6-trimethylcyclohexa-2,5-dien-1-one (1) gives the bridged furan adduct (4) in 80% yield.