中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
2-叠氮基-2-脱氧-D-吡喃葡萄糖1,3,4,6-四乙酸酯 | 1,3,4,6-tetra-O-acetyl-2-azido-2-deoxy-D-glucopyranose | 171032-74-9 | C14H19N3O9 | 373.32 |
1,3,4,6-四-O-乙酰基-2-叠氮-2-脱氧-Β-D-吡喃葡萄糖 | 1,3,4,6-Tetra-O-acetyl-2-azido-2-deoxy-β-D-glucopyranose | 80321-89-7 | C14H19N3O9 | 373.32 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | Acetic acid (1R,2R,3R,4S,5R,6R)-2,3,4-triacetoxy-5-benzyloxy-6-((2R,3R,4R,5S,6R)-4,5-diacetoxy-6-acetoxymethyl-3-azido-tetrahydro-pyran-2-yloxy)-cyclohexyl ester | 625108-33-0 | C33H41N3O17 | 751.698 |
—— | 6-O-benzyl-O-(3,4,6-tri-O-acetyl-2-deoxy-2-azido-α-D-glucopyranosyl)-(1→1)-2,3:4,5-di-O-cyclohexylidene-D-myo-inositol | 418785-06-5 | C37H49N3O13 | 743.808 |
—— | 2'-(allyloxycarbonyl)benzyl 3,4,6-tri-O-acetyl-2-azido-2-deoxy-α-D-glucopyranoside | 902493-60-1 | C23H27N3O10 | 505.481 |
—— | methyl O-(3,4,6-tri-O-acetyl-2-azido-2-deoxy-α-D-glucopyranosyl)-(1-3)-O-(2,4-di-O-benzoyl-α-L-rhamnopyranosyl)-(1-3)-2,4-di-O-benzoyl-α-L-rhamnopyranoside | 142967-80-4 | C53H55N3O20 | 1054.03 |
—— | methyl O-(3,4,6-tri-O-acetyl-2-azido-2-deoxy-α-D-glucopyranosyl)-(1->3)-2,4-di-O-benzoyl-α-L-rhamnopyranoside | 142967-73-5 | C33H37N3O14 | 699.668 |
—— | methyl (3,4,6-tri-O-acetyl-2-azido-2-deoxy-α-D-glucopyranosyl)-(1->3)-(2,4-di-O-benzoyl-α-L-rhamnopyranosyl)-(1->3)-(2,4-di-O-benzoyl-α-L-rhamnopyranosyl)-(1->2)-4,6-O-benzylidene-3-deoxy-α-D-xylo-hexopyranoside | 218279-75-5 | C66H69N3O24 | 1288.28 |
—— | methyl (3,4,6-tri-O-acetyl-2-azido-2-deoxy-α-D-glucopyranosyl)-(1->3)-(2,4-di-O-benzoyl-α-L-rhamnopyranosyl)-(1->3)-(2,4-di-O-benzoyl-α-L-rhamnopyranosyl)-(1->2)-4,6-O-benzylidene-3-deoxy-3-fluoro-α-D-galactopyranoside | 218279-80-2 | C66H68FN3O24 | 1306.27 |
—— | 2'-(allyloxycarbonyl)benzyl (3-O-benzyl-4,6-O-benzylidene-2-O-levulinyl-α-D-mannonopyranosyl)-(1->2)-(3-O-benzyl-4,6-O-benzylidene-β-D-mannopyranosyl)-(1->3)-4,6-O-benzylidene-2-azido-2-deoxy-α-D-glucopyranoside | —— | C69H71N3O19 | 1246.33 |
The synthesis of the suitably protected form (1) of the tetrasaccharide repeat unit, →2)-α-D-Manp-(1→2)-β-D-Manp-(1→3)-α-D-GlcpNAc-(1→6)-α-D-Manp-(1→ (A), of the O-antigen polysaccharide of the lipopolysaccharide from Escherichia coli O77 has been accomplished by latentactive glycosylation employing the 2′-carboxybenzyl (CB) gly coside method. In addition to previously used latent glycosyl donors, 2′-(benzyloxycarbonyl)benzyl (BCB) glycosides, new latent glycosyl donors, 2'-(allyloxycarbonyl)benzyl (ACB) glycosides, have been introduced as a direct precursor for the active CB glycosides. We also demonstrate that 4,6-O-benzylidene-2-azido-2-deoxy-α-D-mannopyranoside (7) has been readily prepared from D-glucosamine in good yield.Key words: Escherichia coli O77, glycosylation, 2′-carboxybenzyl (CB) glycosides, 2′-(allyloxycarbonyl)benzyl (ACB) glycosides, glycosyl donor.