乙酸酐 、
Ethyl-(2,3,4,6-tetra-O-p-toluyl-β-D-galactopyranosyl)-(1->3)-O-<(2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl)-(1->4)-O-(3,6-di-O-acetyl-2-desoxy-2-phtalimido-β-D-glucopyranosyl)>-(1->6)-2-azido-2-desoxy-1-thio-β-D-galactopyranosid 在
吡啶 作用下,
反应 6.0h,
以91%的产率得到Ethyl-(2,3,4,6-tetra-O-p-toluyl-β-D-galactopyranosyl)-(1->3)-O-<(2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl)-(1->4)-O-(3,6-di-O-acetyl-2-desoxy-2-phtalimido-β-D-glucopyranosyl)>-(1->6)-4-O-acetyl-2-azido-2-desoxy-1-thio-β-D-galactopyranosid