7β-bromocholesterol acetate 在
2,4,6-三甲基吡啶 作用下,
以
xylene 为溶剂,
反应 0.33h,
以35.1%的产率得到2,2-Dimethyl-propionic acid (1S,3R,9S,10R,13R,14R,17R)-17-((S)-1,5-dimethyl-hexyl)-3-(2,2-dimethyl-propionyloxy)-10,13-dimethyl-2,3,4,9,10,11,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-1-yl ester