Regiochemical Trends in Intramolecular Photocycloadditions of 6-(Prop-2-enyl)cyclohex-2-enones and 5-(Prop-2-enyl)cyclopent-2-enones

Article abstract of DOI:10.1002/hlca.19900730208

The effect of substituents (X = H, Me, or F at C(6), R = H, Me at C(2') of the allyl side chain) on the photoisomerization (λ = 350 nm) of 6-allylcyclohex-2-enones 1 in MeCN is studied.Substituents X control the overall efficiency of intramolecular <2 + 2