在
对甲苯磺酸 作用下,
以
甲醇 为溶剂,
以71%的产率得到[(1S,2S,3R,4S,7R,9S,10S,12R,15S)-4-acetyloxy-1-hydroxy-9,12-bis[[3-hydroxy-2-(hydroxymethyl)-2-methylpropanoyl]oxy]-15-[(2R,3S)-2-hydroxy-3-[(2-methylpropan-2-yl)oxycarbonylamino]-3-phenylpropanoyl]oxy-10,14,17,17-tetramethyl-11-oxo-6-oxatetracyclo[11.3.1.03,10.04,7]heptadec-13-en-2-yl] benzoate