(1aR,3aR,3bS,5aR,6S,8aS,8bS,10R,10aR)-6-((E)-(1R,4S)-4-Ethyl-1,5-dimethyl-hex-2-enyl)-3a,5a-dimethyl-hexadecahydro-cyclopenta[a]cyclopropa[2,3]cyclopenta[1,2-f]naphthalen-10-ol 在
jones reagent 作用下,
以
丙酮 为溶剂,
以12 g的产率得到24S-ethyl-3α,5-cyclo-5α-cholest-22E-en-6-one