[(1S,2S,3R,4S,7R,9S,10S,12R,15S)-4-acetyloxy-1-hydroxy-10,14,17,17-tetramethyl-11-oxo-12-prop-2-enyl-9,15-bis(triethylsilyloxy)-6-oxatetracyclo[11.3.1.03,10.04,7]heptadec-13-en-2-yl] benzoate 在
对甲苯磺酸 作用下,
以
甲醇 为溶剂,
以75%的产率得到[(1S,2S,3R,4S,7R,9S,10S,12R,15S)-4-acetyloxy-1,9-dihydroxy-10,14,17,17-tetramethyl-11-oxo-12-prop-2-enyl-15-triethylsilyloxy-6-oxatetracyclo[11.3.1.03,10.04,7]heptadec-13-en-2-yl] benzoate