A reaction of electrophilic bromination of norbornadiene homologs such as bicyclo[2.2.2]octa-2,5-diene (4) and bicyclo[3.2.2]nona-6,8-diene (7) with bromine gave hitherto unknown skeleton rearranged dibromides. The rearrangement may proceed via a bromonium cation of starting diene to give bicyclo[3.2.1]octene or bicyclo[3.3.1]nonene skeleton in respective cases. The observed rearrangement reactions
降
冰片二烯同系物如双环 [2.2.2]octa-2,5-二烯 (4) 和双环 [3.2.2]nona-6,8-二烯 (7) 与
溴的亲电
溴化反应得到了迄今为止未知的骨架重排二
溴化物。在各自的情况下,重排可以通过起始二烯的
溴鎓阳离子进行以得到双环[3.2.1]
辛烯或双环[3.3.1]
壬烯骨架。在类似条件下,双环二烯 7 的 6,7-双(甲氧基羰基)衍
生物也证实了观察到的重排反应。