4-O-[(2R,3S,4R,5S,6S)-3-benzoyloxy-5-hydroxy-2-phenylmethoxy-6-(phenylmethoxymethyl)oxan-4-yl] 1-O-[[(2R,3R,4S,5S,6R)-3,4,5-tris(phenylmethoxy)-6-phenylsulfanyloxan-2-yl]methyl] butanedioate 在
N-碘代丁二酰亚胺 、
三氟甲磺酸三甲基硅酯 、 3 A molecular sieve 作用下,
以
乙腈 为溶剂,
以22%的产率得到[(1R,3S,4S,6R,7S,8R,16R,17R,18S,19S)-10,13-dioxo-6,17,18,19-tetrakis(phenylmethoxy)-4-(phenylmethoxymethyl)-2,5,9,14,20-pentaoxatricyclo[14.3.1.03,8]icosan-7-yl] benzoate