[(2R,3S,4S,5R)-6-fluoro-2-methyl-4,5-bis(phenylmethoxy)oxan-3-yl] benzoate 、
(2R,3R,4S,5R,6R)-4,5-Bis-benzyloxy-6-((3aR,5R,6R,7S,7aR)-7-benzyloxy-5-benzyloxymethyl-2,2-dimethyl-tetrahydro-[1,3]dioxolo[4,5-b]pyran-6-yloxy)-2-benzyloxymethyl-tetrahydro-pyran-3-ol 在
4 A molecular sieve 、 silver perchlorate 、 Di-tert-butylpyridine 、 tin(ll) chloride 作用下,
以
乙醚 为溶剂,
生成 、 [(2R,3S,4S,5R,6R)-6-[(2R,3R,4S,5R,6R)-6-[[(3aR,5R,6R,7S,7aR)-2,2-dimethyl-7-phenylmethoxy-5-(phenylmethoxymethyl)-5,6,7,7a-tetrahydro-3aH-[1,3]dioxolo[4,5-b]pyran-6-yl]oxy]-4,5-bis(phenylmethoxy)-2-(phenylmethoxymethyl)oxan-3-yl]oxy-2-methyl-4,5-bis(phenylmethoxy)oxan-3-yl] benzoate