PHOTOCHEMISTRY OF β,γ-ENONES-VIII ON THE RAMARKABLE PHOTOSTABILITY OF SOME β,γ,β',γ'-DIENONES AND THE 1,3-ACYL SHIFT PHOTOREACTIVITY OF TWO β,γ,γ',δ'-DIENONES

Article abstract of DOI:10.1016/S0040-4020(01)96504-4

The irradiation of the β,γ,β',γ'-dienones 1-5 and the β,γ,γ',δ'-dienones (E)-6a, (E)-7a and 8a at λ 300 nm has been studied.The β,γ,β',γ'-dienones 1-5 are remarkable photostable for λ >= 300 nm, even upon prolonged irradiation, in contrast to simple β,γ-e