5α-cholest-1-en-3-one 、
(3-methyl-but-3-en-1-ynyl)-lithium 以
四氢呋喃 为溶剂,
以94%的产率得到(3R,5S,8S,9S,10R,13R,14S,17R)-17-((R)-1,5-Dimethyl-hexyl)-10,13-dimethyl-3-(3-methyl-but-3-en-1-ynyl)-4,5,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-3H-cyclopenta[a]phenanthren-3-ol