5-(methoxycarbonyl)pentyl 4-azido-3-O-benzyl-4,6-dideoxy-α-D-mannopyranosyl-(1->2)-4-azido-3-O-benzyl-4,6-dideoxy-α-D-mannopyranoside 、
2-O-acetyl-4-azido-3-O-benzyl-4,6-dideoxy-α-D-mannopyranosyl (1→2) 4-azido-3-O-benzyl-4,6-dideoxy-α-D-mannopyranosyl (1→3) 2-O-acetyl-4-azido-4,6-dideoxy-D-mannopyranosyl-N-phenyltrifluoroacetimidate 在
三氟甲磺酸三甲基硅酯 作用下,
以
二氯甲烷 为溶剂,
反应 1.5h,
以68%的产率得到5-methoxycarbonylpentyl 2-O-acetyl-4-azido-3-O-benzyl-4,6-dideoxy-α-D-mannopyranosyl(1→2) 4-azido-3-O-benzyl-4,6-dideoxy-α-D-mannopyranosyl (1→3) 2-O-acetyl-4-azido-4,6-dideoxy-α-D-mannopyranosyl (1→2) 4-azido-3-O-benzyl-4,6-dideoxy-α-D-mannopyranosyl(1→2) 4-azido-3-O-benzyl-4,6-dideoxy-α-D-mannopyranoside