1-carbocholestoxy-1-azaspiro<5.5>undecan-8-one 在
L-Selectride 作用下,
以
四氢呋喃 为溶剂,
反应 1.5h,
以99%的产率得到[(3S,8S,9S,10R,13R,14S,17R)-10,13-dimethyl-17-[(2R)-6-methylheptan-2-yl]-2,3,4,7,8,9,11,12,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-3-yl] (10R)-10-hydroxy-1-azaspiro[5.5]undecane-1-carboxylate