Phenyl 4,6-O-benzylidene-2-deoxy-3-O-(4-methoxybenzyl)-2-phthalimido-1-thio-β-D-glucopyranoside 、 [(2R,3R,4S,5R,6R)-3,5-diacetyloxy-4-hydroxy-6-(2-trimethylsilylethoxy)oxan-2-yl]methyl acetate 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92%的产率得到acetic acid 5-acetoxy-6-acetoxymethyl-4-[7-(1,3-dioxo-1,3-dihydro-isoindol-2-yl)-8-(4-methoxy-benzyloxy)-2-phenyl-hexahydro-pyrano[3,2-d][1,3]dioxin-6-yloxy]-2-(2-trimethylsilanyl-ethoxy)-tetrahydro-pyran-3-yl ester