(22R,23R,25S)-22-acetoxy-23-methoxymethoxy-6β-methoxy-3α,5-cyclo-5α-24-norcholestane 在
对甲苯磺酸 作用下,
以
1,4-二氧六环 为溶剂,
反应 1.0h,
以100 mg的产率得到Acetic acid (1R,2R)-2-hydroxy-1-[(S)-1-((3S,8S,9S,10R,13S,14S,17R)-3-hydroxy-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl)-ethyl]-3-methyl-butyl ester