rel-(3S,4S,4aS,7R,7aS,12bS,12cR)-7-Cyano-2,3,4,4a,5,6,7,7a,8,12b-decahydro-9,12-dimethoxy-3-methyl-12cH-4,12c-ethanoanthra<9,1-bc>oxepin 在
二异丁基氢化铝 作用下,
以
甲苯 为溶剂,
反应 1.65h,
以93%的产率得到rel-(3S,4S,4aS,7R,7aS,12bS,12cR)-2,3,4,4a,5,6,7,7a,8,12b-Decahydro-9,12-dimethoxy-3-methyl-12cH-4,12c-ethanoanthra<9,1-bc>oxepin-7-carboxaldehyde