Intramolecular photoreactions of cyclopentenones and styrenes fixed in a rigid molecule

Article abstract of DOI:10.1016/0040-4039(95)01311-5

8- and 9-phenyltricyclo[5.2.1.0^2,6]deca-4,8-dien-3-ones were prepared and their photochemical behavior was examined. Although each of the compounds gave an intramolecular [2+2] cycloaddition product upon direct irradiation, it was found that details of the respective reaction pathways strikingly differ from one another according to orientation of the styrene and enone moieties.