在
四丁基氟化铵 作用下,
以
四氢呋喃 为溶剂,
反应 5.0h,
以92%的产率得到(2R,3R,3aS,7R,10S,11R,12S,13S,14S,15S,16R,21S,24S,27S,29R,31R,32aS)-2-[(2S)-3-Amino-2-hydroxypropyl]octacosahydro-12,15-dihydroxy-3-methoxy-29-methyl-23,30-bis(methylene)-7,11:10,14:13,16:21,24:27,31-pentaepoxy-2H-cyclohentriaconta[b]furan-5,18(3H,4H)-dione