[(1S,5S,9S,10S,11S,12R,14R,17R)-14-ethenyl-10-hydroxy-8,8,12,14,17-pentamethyl-16-oxo-3-sulfanylidene-2,4,13-trioxatetracyclo[7.7.1.01,12.05,17]heptadecan-11-yl] acetate 在
1,3-二甲基-2-苯基-2-磷杂咪唑烷 作用下,
反应 12.0h,
以69%的产率得到[(1S,7R,9S,10S,11S,12S,16S)-7-ethenyl-11-hydroxy-7,9,13,13,16-pentamethyl-3-oxo-2,4,8-trioxatetracyclo[7.6.2.05,17.012,16]heptadec-5(17)-en-10-yl] acetate