、 methyl (methyl 2-O-acetyl-3-O-benzyl-α-L-idopyranosyluronate)-(1-4)-3-O-benzyl-2-benzyloxycarbonylamino-6-O-tert-butyldiphenylsilyl-2-deoxy-α-D-glucopyranoside 在
叔丁基二甲硅基三氟甲磺酸酯 、
碳酸氢钠 作用下,
以
二氯甲烷 为溶剂,
反应 1.67h,
以83%的产率得到methyl (methyl-2-O-acetyl-3-O-benzyl-4-O-levulinoyl-α-L-idopyranosyluronate)-(1-4)-(6-O-acetyl-2-azido-3-O-benzyl-2-deoxy-α-D-glucopyranosyl)-(1-4)-(methyl-2-O-acetyl-3-O-benzyl-α-L-idopyranosyluronate)-(1-4)-3-O-benzyl-6-O-tert-butyldiphenylsilyl-2-deoxy-2-[(benzyloxy)carbonyl]amino-α-D-glucopyranoside