[(2R,3S,4S,5R,6S)-4,5-dibenzoyloxy-2-[(2-chloroacetyl)oxymethyl]-6-[(2R,3S,4R,5R,6S)-5-(1,3-dioxoisoindol-2-yl)-4-phenylmethoxy-2-(phenylmethoxymethyl)-6-phenylsulfanyloxan-3-yl]oxyoxan-3-yl] benzoate 在
N-溴代丁二酰亚胺(NBS) 、
二乙胺基三氟化硫 作用下,
以
二氯甲烷 为溶剂,
反应 3.0h,
以84%的产率得到[(2R,3S,4S,5R,6S)-4,5-dibenzoyloxy-2-[(2-chloroacetyl)oxymethyl]-6-[(2R,3S,4R,5R,6S)-5-(1,3-dioxoisoindol-2-yl)-6-fluoro-4-phenylmethoxy-2-(phenylmethoxymethyl)oxan-3-yl]oxyoxan-3-yl] benzoate