在
1,2-乙二硫醇 、 (+)-10-camphorsulfonic acid 作用下,
以
氯仿 为溶剂,
反应 1.0h,
以10.8 mg的产率得到[(3S,5S,6R,7R,8S,9S,10S,11S,13S,14S,16S,17R)-3-[tert-butyl(dimethyl)silyl]oxy-17-[(E,2R,5R)-5,6-dimethylhept-3-en-2-yl]-6,7-dihydroxy-10,13-dimethyl-11-triethylsilyloxy-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-16-yl] acetate