Benzyl O-(3-O-allyl-2,6-di-O-benzyl-β-D-galactopyranosyl)-(1->4)-2,3,6-tri-O-benzyl-β-D-glucopyranoside 、
O-(2,3,4,6-Tetra-O-acetyl-β-D-galactopyranosyl)-(1->3)-(4-O-acetyl-2-azido-6-O-benzoyl-2-deoxy-α-D-galactopyranosyltrichloroacetimidate 在
三氟甲磺酸三甲基硅酯 、 4 A molecular sieve 作用下,
以
乙腈 为溶剂,
反应 1.0h,
以46%的产率得到Benzyl O-(2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl)-(1->3)-(4-O-acetyl-2-azido-6-O-benzoyl-2-deoxy-β-D-galactopyranosyl)-(1->4)-(3-O-allyl-2,6-di-O-benzyl-β-D-galactopyranosyl)-(1->4)-2,3,6-tri-O-benzyl-β-D-glucopyranoside