对甲苯磺酰氯 、 (1S,2R,5R,6R,9S,10R,13S,15R,16R,20S)-5-[(E,2R,5R)-5,6-dimethylhept-3-en-2-yl]-13-hydroxy-6,10-dimethyl-18-oxahexacyclo[13.5.2.01,9.02,6.010,15.016,20]docos-21-en-19-one 在
吡啶 作用下,
反应 24.0h,
以72%的产率得到[(1S,2R,5R,6R,9S,10R,13S,15R,16R,20S)-5-[(E,2R,5R)-5,6-dimethylhept-3-en-2-yl]-6,10-dimethyl-19-oxo-18-oxahexacyclo[13.5.2.01,9.02,6.010,15.016,20]docos-21-en-13-yl] 4-methylbenzenesulfonate