methyl (methyl-3,4-di-O-benzyl-a-L-idopyranosyluronate)-(1-4)-(2-azido-3-O-benzyl-2-deoxy-a-D-glucopyranosyl)-(1-4)-(methyl-3-O-benzyl-a-L-idopyranosyluronate)-(1-4)-(2-azido-3-O-benzyl-6-O-tert-butyldiphenylsilyl-2-deoxy-a-D-glucopyranosyl)-(1-4)-(methyl-3-O-benzyl-a-L-idopyranosyluronate)-(1-4)-(2-azido-3-O-benzyl-2-deoxy-a-D-glucopyranosyl)-(1-4)-(methyl-3-O-benzyl-a-L-idopyranosyluronate)-(1-4)-3-O-benzyl-6-O-tert-butyldiphenylsilyl-2-deoxy-2-[(benzyloxy)carbonyl]-amino-a-D-glucopyr 在
氟化铵 作用下,
以
甲醇 为溶剂,
反应 24.0h,
以46%的产率得到methyl (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-6-O-tert-butyldiphenylsilyl-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-α-D-glucopyranoside