benzyl O-(2,3,4-tri-O-benzyl-α-L-fucopyranosyl)-(1<*>2)-O-(4,6-O-benzylidene-β-D-galactopyranosyl)-(1<*>4)-2-acetamido-3,6-di-O-benzyl-2-deoxy-α-D-glucopyranoside 、
2,3,4,6-tetra-O-benzyl-1-O-(N-methylacetimidoyl)-β-D-galactopyranose 在
4 A molecular sieve 、
对甲苯磺酸 作用下,
以
硝基甲烷 为溶剂,
反应 48.0h,
以90%的产率得到benzyl O-(2,3,4-tri-O-benzyl-α-L-fucopyranosyl)-(1<*>2)-O-(2,3,4,6-tetra-O-benzyl-α-D-galactopyranosyl)-(1<*>3)-O-(4,6-O-benzylidene-β-D-galactopyranosyl)-(1<*>4)-2-acetamido-3,6-di-O-benzyl-2-deoxy-α-D-glucopyranoside