benzyl 2-O-benzoyl-4,6-O-benzylidene-β-D-glucopyranoside 、
4-Methoxy-benzoic acid (2R,3R,4S,5R,6R)-2-((2R,3S,4S,5R,6S)-5-benzoyloxy-3-benzyloxy-4-hydroxy-6-phenylsulfanyl-tetrahydro-pyran-2-ylmethoxy)-4,5-bis-benzyloxy-6-benzyloxymethyl-tetrahydro-pyran-3-yl ester 在
N-碘代丁二酰亚胺 、
三氟甲磺酸 、 4 A molecular sieve 作用下,
以
二氯甲烷 为溶剂,
以69%的产率得到[(2R,3R,4S,5R,6R)-2-[[(2R,3S,4S,5R,6S)-6-[[(2R,4aR,6R,7R,8S,8aR)-7-benzoyloxy-2-phenyl-6-phenylmethoxy-4,4a,6,7,8,8a-hexahydropyrano[3,2-d][1,3]dioxin-8-yl]oxy]-5-benzoyloxy-4-hydroxy-3-phenylmethoxyoxan-2-yl]methoxy]-4,5-bis(phenylmethoxy)-6-(phenylmethoxymethyl)oxan-3-yl] 4-methoxybenzoate