allyl 2,3,4,6-tetra-O-benzoyl-α-D-mannopyranosyl-(1->3)-2,4-di-O-benzoyl-α-D-mannopyranoside 、 2,3,4,6-tetra-O-benzoyl-α-D-mannopyranosyl-(1->3)-[2,3,4,6-tetra-O-benzoyl-α-D-mannopyranosyl-(1->6)]-2,4-di-O-benzoyl-α-D-mannopyranosyl trichloroacetimidate 在
三氟甲磺酸三甲基硅酯 作用下,
以
二氯甲烷 为溶剂,
反应 2.0h,
以85%的产率得到allyl 2,3,4,6-tetra-O-benzoyl-α-D-mannopyranosyl-(1->6)-[2,3,4,6-tetra-O-benzoyl-α-D-mannopyranosyl-(1->3)]-2,4-di-O-benzoyl-α-D-mannopyranosyl-(1->6)-[2,3,4,6-tetra-O-benzoyl-α-D-mannopyranosyl-(1->3)]-2,4-di-O-benzoyl-α-D-mannopyranoside