Abstract
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.
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