benzotricyclo[5.2.2.02,6]undecanes endowed with a β,γ-enone chromophore. Photochemical reaction of β,γ-enones upon direct irradiation (1S) gave annulated bicyclo[4.2.0]octenones as a consequence of a stereoselective 1,3-acyl shift. Triplet excitation of chromophoric systems led to oxa-di-π-methane reaction and gave pentacyclic products which upon cleavage of cyclopropane ring furnished benzoannulated triquinanes
                                    已经描述了6,6-螺环环氧环己基2,4-二
壬烯与
茚的区域和立体选择性环加成反应,导致苯并环化的螺环环氧
三环[5.2.2.0 2,6 ] undec -10-en-9-ones。在加合物中对
环氧乙烷环的操作提供了具有β,γ-烯酮发色团的苯并
三环[5.2.2.0 2,6 ]
十一烷。直接立体照射(1S)时,β,γ-烯酮的光
化学反应产生双环[4.2.0]
辛烯酮,这是立体选择性的1,3-酰基转移的结果。发色体系的三重激发导致氧-二-π-
甲烷反应并产生五环产物,其在
环丙烷环裂解时提供苯并环化的三喹烷。还已经观察到取代基对光反应的有趣作用。