methyl 2-deoxy-4-O-(3,4-O-isopropylidene-β-D-galactopyranosyl)-2-phthalimido-β-D-glucopyranoside | 131284-06-5

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: methyl 2-deoxy-4-O-(3,4-O-isopropylidene-β-D-galactopyranosyl)-2-phthalimido-β-D-glucopyranoside
• 英文别名: 2-[(2R,3R,4R,5S,6R)-5-[[(3aS,4R,6S,7R,7aR)-7-hydroxy-4-(hydroxymethyl)-2,2-dimethyl-4,6,7,7a-tetrahydro-3aH-[1,3]dioxolo[4,5-c]pyran-6-yl]oxy]-4-hydroxy-6-(hydroxymethyl)-2-methoxyoxan-3-yl]isoindole-1,3-dione
• CAS: 131284-06-5
• 化学式: C₂₄H₃₁NO₁₂
• 分子量: 525.51
• InChiKey: FWMYDXORIYLHPT-FHKGKVBDSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -1.64
• 重原子数：
  37.0
• 可旋转键数：
  6.0
• 环数：
  5.0
• sp3杂化的碳原子比例：
  0.67
• 拓扑面积：
  173.68
• 氢给体数：
  4.0
• 氢受体数：
  12.0

反应信息

• 作为反应物：
  描述：

  methyl 2-deoxy-4-O-(3,4-O-isopropylidene-β-D-galactopyranosyl)-2-phthalimido-β-D-glucopyranoside 在 三氟乙酸 作用下， 以 吡啶 、 二氯甲烷 为溶剂， 反应 2.0h， 生成 methyl 3,6-di-O-acetyl-2-deoxy-4-O-(2,6-di-O-acetyl-β-D-galactopyranosyl)-2-phthalimido-β-D-glucopyranoside
  参考文献：
  名称：

  Syntheses of linear tetra-, hexa-, and octa-saccharide fragments of the i-blood group active poly-(N-acetyl-lactosamine) series. Blockwise methods for the synthesis of repetitive oligosaccharide sequences

  摘要：

  N-Phthaloylation of lactosamine gave various glycosyl donors (beta-chloride, beta-trichloroacetimidate) and glycosyl acceptors (3',4'-diol). Coupling of the chloride with a methyl beta-D-glycoside led to the tetrasaccharide fragment, beta-D-Galp-(1----4)-beta-D-GlcpNac-(1----3)-beta-D-Galp-(1----4)- beta-D-GlcpNAcOMe. Acetolysis of the protected tetrasaccharide, followed by treatment with hydrogen chloride, gave a tetrasaccharide chloride which was coupled with the methyl beta-glycoside of lactosamine. A hexasaccharide fragment, [beta-D-Galp-(1----4)-beta-D-GlcpNAc-(1----3)]2-beta-D-Galp-(1----4)-bet a- D-GlcpNAcOMe, was thus obtained by this ("n + 1") method. A more efficient ("n + n") method was applied for the synthesis of an octasaccharide fragment, [beta-D-Galp-(1----4)-beta-D-GlcpNAc-(1----3)]3-beta-D-Galp- (1----4)-beta-D-GlcpNAcOMe (38), where di- and tetra-saccharide intermediates having a 3,4-O-isopropylidene-beta-D-galactopyranosyl nonreducing terminal group and a benzyl beta-D-glycoside group were precursors, either as glycosyl donors (beta-trichloroacetimidates) or glycosyl acceptors (3,4-diols as nonreducing terminal groups). Thus, doubling the length of the repetitive oligosaccharide sequence could be efficiently accomplished at each glycosylation step.

  DOI：

  10.1016/0008-6215(90)80002-k
• 作为产物：
  描述：

  2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl(1<*>4)-2-deoxy-2-phthalimido-3,6-di-O-acetyl-β-D-glucopyranosyl chloride 在 对甲苯磺酸 calcium sulfate 、 sodium methylate 、 mercury dichloride 、 mercury(II) oxide 作用下， 以 1,4-二氧六环 、 甲醇 、 二氯甲烷 为溶剂， 反应 9.5h， 生成 methyl 2-deoxy-4-O-(3,4-O-isopropylidene-β-D-galactopyranosyl)-2-phthalimido-β-D-glucopyranoside
  参考文献：
  名称：

  Syntheses of linear tetra-, hexa-, and octa-saccharide fragments of the i-blood group active poly-(N-acetyl-lactosamine) series. Blockwise methods for the synthesis of repetitive oligosaccharide sequences

  摘要：

  N-Phthaloylation of lactosamine gave various glycosyl donors (beta-chloride, beta-trichloroacetimidate) and glycosyl acceptors (3',4'-diol). Coupling of the chloride with a methyl beta-D-glycoside led to the tetrasaccharide fragment, beta-D-Galp-(1----4)-beta-D-GlcpNac-(1----3)-beta-D-Galp-(1----4)- beta-D-GlcpNAcOMe. Acetolysis of the protected tetrasaccharide, followed by treatment with hydrogen chloride, gave a tetrasaccharide chloride which was coupled with the methyl beta-glycoside of lactosamine. A hexasaccharide fragment, [beta-D-Galp-(1----4)-beta-D-GlcpNAc-(1----3)]2-beta-D-Galp-(1----4)-bet a- D-GlcpNAcOMe, was thus obtained by this ("n + 1") method. A more efficient ("n + n") method was applied for the synthesis of an octasaccharide fragment, [beta-D-Galp-(1----4)-beta-D-GlcpNAc-(1----3)]3-beta-D-Galp- (1----4)-beta-D-GlcpNAcOMe (38), where di- and tetra-saccharide intermediates having a 3,4-O-isopropylidene-beta-D-galactopyranosyl nonreducing terminal group and a benzyl beta-D-glycoside group were precursors, either as glycosyl donors (beta-trichloroacetimidates) or glycosyl acceptors (3,4-diols as nonreducing terminal groups). Thus, doubling the length of the repetitive oligosaccharide sequence could be efficiently accomplished at each glycosylation step.

  DOI：

  10.1016/0008-6215(90)80002-k

文献信息

• ALAIS, J.;VEYRIERES, A., CARBOHYDR. RES., 207,(1990) N, C. 11-31
  作者：ALAIS, J.、VEYRIERES, A.

  DOI：——

  日期：——