Methyl [methyl 4,7,8,9-tetra-O-acetyl-5-(N-acetylacetamido)-3,5-dideoxy-2-thio-D-glycero-α,β-D-galacto-non-2-ulopyranosid]onate 、
Methyl [2-(trimethylsilyl)ethyl 4,7-di-O-acetyl-5-(N-acetylacetamido)-9-O-benzyl-3,5-dideoxy-D-glycero-α-D-galacto-non-2-ulopyranosid]onate 在
N-碘代丁二酰亚胺 、
三氟甲磺酸 、 3 A molecular sieve 作用下,
以
乙腈 为溶剂,
生成 Methyl 2-(trimethylsilyl)ethyl 4,7-di-O-acetyl-5-(N-acetylacetamido)-9-O-benzyl-3,5-dideoxy-8-O-[methyl 4,7,8,9-tetra-O-acetyl-5-(N-acetylacetamido)-3,5-dideoxy-D-glycero-β-D-galacto-non-2-ulopyranosylonate]-D-glycero-α-D-galacto-non-2-ulopyranosid... 、 Methyl 2-(trimethylsilyl)ethyl 4,7-di-O-acetyl-5-(N-acetylacetamido)-9-O-benzyl-3,5-dideoxy-8-O-[methyl 4,7,8,9-tetra-O-acetyl-5-(N-acetylacetamido)-3,5-dideoxy-D-glycero-α-D-galacto-non-2-ulopyranosylonate]-D-glycero-α-D-galacto-non-2-ulopyranosid...