exo-trans-exo-pentacyclo<8.2.1.14,7.02,9.03,8>tetradecane-5,11-diene 在
三氟甲烷磺酸亚铜(I)苯联合体 (2:1) 作用下,
以30%的产率得到(1R,4S,4aS,4bR,5R,5aR,5bR,6R,6aR,6bS,7S,10R,10aR,10bS,11S,11aS,11bS,12S,12aS,12bR)-1,4,4a,4b,5,5a,5b,6,6a,6b,7,10,10a,10b,11,11a,11b,12,12a,12b-icosahydro-1,4:5,12:6,11:7,10-tetramethanocyclobuta[1,2-b:3,4-b']dibiphenylene