在
四丁基氟化铵 作用下,
以
四氢呋喃 为溶剂,
以55%的产率得到(9R,10aS,11R,11aS,13aR,14aS,15S,16S,20S)-11a-acetoxy-16,20-dihydroxy-10a,17,17,19-tetramethyl-10-oxo-4,5,9,10,10a,11a,12,13a,14,14a-decahydro-11H-9,11-([1,3]benzenomethano)oxeto[3',2':4,5]benzo[1,2-i][1,3,6,8]tetraoxacyclododecin-15-yl benzoate