methyl 2,4,6-tri-O-benzoyl-β-D-galactopyranosyl-(1->3)-2,4-di-O-benzoyl-6-O-chloroacetyl-β-D-galactopyranosyl-(1->4)-2,3,6-tri-O-benzoyl-α-D-mannopyranoside 、
Benzoic acid (2R,3R,4S,5S,6R)-5-acetoxy-6-acetoxymethyl-4-((2S,3R,4S,5S,6R)-3,4,5-triacetoxy-6-acetoxymethyl-tetrahydro-pyran-2-yloxy)-2-(2,2,2-trichloro-acetimidoyloxy)-tetrahydro-pyran-3-yl ester 在
三氟甲磺酸三甲基硅酯 作用下,
以
二氯甲烷 为溶剂,
反应 1.33h,
以68%的产率得到methyl 2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl-(1->3)-4,6-di-O-acetyl-2-O-benzoyl-β-D-galactopyranosyl-(1->3)-2,4,6-tri-O-benzoyl-β-D-galactopyranosyl-(1->3)-2,4-di-O-benzoyl-6-O-chloroacetyl-β-D-galactopyranosyl-(1->4)-2,3,6-tri-O-benzoyl-...