rac-methyl (1R,4aR,4bS,8aS,10aR)-4b,8,8,10a-tetramethyldodecahydro-1H-spiro[phenanthrene-2,2'-[1,3]dioxolane]-1-carboxylate 在
二异丁基氢化铝 作用下,
以
甲苯 为溶剂,
以97%的产率得到rac-((1R,4aS,4bR,8aR,10aS)-4b,8,8,10a-tetramethyldodecahydro-1H-spiro[phenanthrene-2,2'-[1,3]dioxolan]-1-yl)methanol