4-pentenyl (methyl 2-O-acetyl-3,4-di-O-benzyl-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)-(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)-(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)-6-O-acetyl-3-O-benzyl-2-deoxy-2-[(benzyloxy)carbonyl]amino-β-D-glucopyranoside 在
sodium methylate 作用下,
以
甲醇 、
二氯甲烷 为溶剂,
反应 16.0h,
以69%的产率得到4-pentenyl (methyl 3,4-di-O-benzyl-α-L-idopyranosyluronate)-(1-4)-(2-azido-3-O-benzyl-2-deoxy-α-D-glucopyranosyl)-(1-4)-(methyl 3-O-benzyl-α-L-idopyranosyluronate)-(1-4)-(2-azido-3-O-benzyl-2-deoxy-α-D-glucopyranosyl)-(1-4)-(methyl 3-O-benzyl-α-L-idopyranosyluronate)-(1-4)-(2-azido-3-O-benzyl-2-deoxy-α-D-glucopyranosyl)-(1-4)-(methyl 3-O-benzyl-α-L-idopyranosyluronate)-(1-4)-3-O-benzyl-2-deoxy-2-[(benzyloxy)carbonyl]amino-β-D-glucopyranoside