Acetic acid (3S,8S,9S,10R,13R,14S)-17-((R)-1,5-dimethyl-hexyl)-10-((E)-2-methoxy-vinyl)-13-methyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-3-yl ester 在
溶剂黄146 作用下,
反应 2.0h,
以3.1 g的产率得到3β-acetoxy-cholest-5-ene-19-carbaldehyde