acetic acid 4-acetoxy-2-acetoxymethyl-5-benzyloxycarbonylamino-6-(2,2,2-trichloroacetimidoyloxy)-tetrahydro-pyran-3-yl ester 、
豆甾醇 在
三氟化硼乙醚 作用下,
以
甲醚 为溶剂,
反应 16.0h,
以21%的产率得到acetic acid 4-acetoxy-2-acetoxymethyl-5-benzyloxycarbonylamino-6-[17-(4-ethyl-1,5-dimethyl-2-hexenyl)-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cydopenta[a]phenanthren-3-yloxy]-tetrahydro-pyran-3-yl ester