(1S,3aS,4R,4aS,5R,8aS)-4-(3,4-Dimethoxy-phenyl)-5-hydroxy-1,3a-dimethyl-octahydro-cyclopenta[1,4]cyclobuta[1,2]benzen-8-one 在
对甲苯磺酸 作用下,
以
甲苯 为溶剂,
反应 3.0h,
以77%的产率得到(3aS,5aS,8S,8aS)-5-(3,4-Dimethoxy-phenyl)-5a,8-dimethyl-3,3a,5a,6,7,8-hexahydro-2H-cyclopenta[c]pentalen-1-one