[(1R,2S,5R,7S,8S,10R,11E,14S)-2,10-diacetyloxy-8,12,12-trimethyl-9,13-dioxo-11-(1-oxopropan-2-ylidene)-7-triethylsilyloxy-4-oxatricyclo[6.6.0.02,5]tetradecan-14-yl] benzoate 在
sodium cyanoborohydride 作用下,
以
甲醇 、 acetate buffer 为溶剂,
反应 4.0h,
以51%的产率得到[(1R,2S,3R,4S,7R,9S,10S,12R)-4,12-diacetyloxy-1-hydroxy-10,14,17,17-tetramethyl-11-oxo-9-triethylsilyloxy-6,16-dioxatetracyclo[11.3.1.03,10.04,7]heptadec-13-en-2-yl] benzoate