4,4-dimethyl-16β-(tert-butyldimethylsilyloxy)cholest-5-en-3-one 在
lithium aluminium tetrahydride 作用下,
以
四氢呋喃 为溶剂,
以99%的产率得到(3S,8S,9S,10R,13S,14S,16S,17R)-16-(tert-Butyl-dimethyl-silanyloxy)-17-((R)-1,5-dimethyl-hexyl)-4,4,10,13-tetramethyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-3-ol