2-{(2R,4aR,6R,7R,8R,8aS)-6-Allyloxy-2-phenyl-8-[(2S,3S,4R,5R,6S)-3,4,5-tris-(4-chloro-benzyloxy)-6-methyl-tetrahydro-pyran-2-yloxy]-hexahydro-pyrano[3,2-d][1,3]dioxin-7-yl}-isoindole-1,3-dione 在
三氟甲磺酸 、 3 A molecular sieve 、 sodium cyanoborohydride 作用下,
以
四氢呋喃 、
乙醚 为溶剂,
生成 [(2R,3S,4S,5R,6S)-3,4,5-triacetyloxy-6-[(2R,3S,4R,5R,6R)-5-(1,3-dioxoisoindol-2-yl)-2-(phenylmethoxymethyl)-6-prop-2-enoxy-4-[(2S,3S,4R,5R,6S)-3,4,5-tris[(4-chlorophenyl)methoxy]-6-methyloxan-2-yl]oxyoxan-3-yl]oxyoxan-2-yl]methyl acetate