rac-(1R,2aS,3S,9R,10S)-1,2a,3,10-tetramethyl-9-(2-methylallyl)-2-methylene-1,2,2a,3,4,8b-hexahydro-3,1-ethanocyclobuta[a]naphthalene 在
sodium hydroxide 作用下,
以
甲醇 为溶剂,
反应 3.0h,
以92%的产率得到rac-(1R,1aS,1a1S,3R,3aS,9S)-1,1a,1a1,3a,9-pentamethyl-1,1a,1a1,2,3,3a,4,8b-octahydro-1,3-methanobenzo[f]cyclobuta[cd]indene