(4aR,5aS,6R,9aR,10aS)-8-(((2R,3S,5R,6S)-5-(benzyloxy)-6-(2-(benzyloxy)ethyl)-3-((4-methoxybenzyl)oxy)-2-methyltetrahydro-2H-pyran-2-yl)methyl)-2,2-di-tert-butyl-5a-methyl-4a,5a,6,9a,10,10a-hexahydro-4H-pyrano[2',3':5,6]pyrano[3,2-d][1,3,2]dioxasilin-6-ol 在
BF3*THF 、
双氧水 、 sodium hydroxide 作用下,
以
四氢呋喃 、
水 为溶剂,
以80%的产率得到(4aR,5aS,6R,7R,8S,9aR,10aS)-8-(((2R,3S,5R,6S)-5-(benzyloxy)-6-(2-(benzyloxy)ethyl)-3-((4-methoxybenzyl)oxy)-2-methyltetrahydro-2H-pyran-2-yl)methyl)-2,2-di-tert-butyl-5a-methyloctahydro-4H-pyrano[2',3':5,6]pyrano[3,2-d][1,3,2]dioxasiline-6,7-diol