4-methoxyphenyl 4,6-O-benzylidene-2-deoxy-3-O-pivaloyl-2-trichloroacetamido-β-D-glucopyranoside | 445397-53-5

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 吡喃二恶英
• 英文名称: 4-methoxyphenyl 4,6-O-benzylidene-2-deoxy-3-O-pivaloyl-2-trichloroacetamido-β-D-glucopyranoside
• CAS: 445397-53-5
• 化学式: C₂₇H₃₀Cl₃NO₈
• 分子量: 602.896
• InChiKey: NDPZVJBLVAWUHP-YTAOHXRWSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.73
• 重原子数：
  39.0
• 可旋转键数：
  6.0
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.48
• 拓扑面积：
  101.55
• 氢给体数：
  1.0
• 氢受体数：
  8.0

反应信息

• 作为反应物：
  描述：

  4-methoxyphenyl 4,6-O-benzylidene-2-deoxy-3-O-pivaloyl-2-trichloroacetamido-β-D-glucopyranoside 在 potassium bromide 吡啶 、 三乙基硅烷 、 2,2,6,6-tetramethyl-piperidine-N-oxyl 、 calcium hypochlorite 、 ammonium cerium(IV) nitrate 、 三氟甲磺酸酐 、 三氟甲磺酸三甲基硅酯 、 碳酸氢钠 、 溶剂黄146 、 硫脲 、 三氟乙酸 作用下， 以 吡啶 、 乙醇 、 二氯甲烷 、 水 、 1,2-二氯乙烷 、 N,N-二甲基甲酰胺 、 甲苯 、 乙腈 为溶剂， 反应 10.0h， 生成 methyl (methyl 2-O-benzoyl-3-O-benzyl-α-L-idopyranosyluronate)-(1->3)-6-O-benzyl-2-deoxy-4-O-pivaloyl-2-trichloroacetamido-β-D-galactopyranoside
  参考文献：
  名称：

  An access to various sulfation patterns in dermatan sulfate: chemical syntheses of sulfoforms of trisaccharide methyl glycosides

  摘要：

  The syntheses are reported for the first time of alpha-L-IdopA(2)SO(3)-(1-->3)-beta-D-GalpNAc4SO(3)-(1-->4)-alpha-L-IdopA2SO(3)-(1-->OMe), its disulfated analogue alpha-L-IdopA2SO(3)-(1-->3)-beta-D-GalpNAc4SO(3)-(1-->4)-alpha-L-IdopA2SO(3)-(1-->OMe), and of beta-D-GalpNAc4SO(3)-(1-->4)-alpha-L-IdopA2SO(3)-(1-->3)-beta-D-GalpNAc4SO(3)-(1-->OMe), which represent structural fragments of dermatan sulfate, unavailable directly by chemical or enzymatic degradation of the glycosaminoglycan polymer. These molecules were readily obtained from a pair of key disaccharide intermediates, in which the relative difference of stability of the D-GalNAc 4-hydroxy protecting groups (acetate or pivalate) toward saponification conditions allowed access to various sulfoforms from a common precursor. For the preparation of these blocks, the 4-O-pivaloyl-D-galacto moiety was readily obtained through a one-pot stereospecific intramolecular nucleophilic displacement on an easily available 3-O-pivaloyl-D-gluco precursor,and the L-IdoA moiety through selective radical oxidation at C-6 of a L-ido 4,6-diol derivative with oxoammonium salts. (C) 2002 Elsevier Science Ltd. All rights reserved.

  DOI：

  10.1016/s0008-6215(02)00060-5
• 作为产物：
  描述：

  三甲基乙酰氯 、 4-methoxyphenyl 4,6-O-benzylidene-2-deoxy-2-trochloroacetamido-β-D-glucopyranoside 在 4-二甲氨基吡啶 作用下， 以 吡啶 、 二氯甲烷 为溶剂， 以82%的产率得到4-methoxyphenyl 4,6-O-benzylidene-2-deoxy-3-O-pivaloyl-2-trichloroacetamido-β-D-glucopyranoside
  参考文献：
  名称：

  An access to various sulfation patterns in dermatan sulfate: chemical syntheses of sulfoforms of trisaccharide methyl glycosides

  摘要：

  The syntheses are reported for the first time of alpha-L-IdopA(2)SO(3)-(1-->3)-beta-D-GalpNAc4SO(3)-(1-->4)-alpha-L-IdopA2SO(3)-(1-->OMe), its disulfated analogue alpha-L-IdopA2SO(3)-(1-->3)-beta-D-GalpNAc4SO(3)-(1-->4)-alpha-L-IdopA2SO(3)-(1-->OMe), and of beta-D-GalpNAc4SO(3)-(1-->4)-alpha-L-IdopA2SO(3)-(1-->3)-beta-D-GalpNAc4SO(3)-(1-->OMe), which represent structural fragments of dermatan sulfate, unavailable directly by chemical or enzymatic degradation of the glycosaminoglycan polymer. These molecules were readily obtained from a pair of key disaccharide intermediates, in which the relative difference of stability of the D-GalNAc 4-hydroxy protecting groups (acetate or pivalate) toward saponification conditions allowed access to various sulfoforms from a common precursor. For the preparation of these blocks, the 4-O-pivaloyl-D-galacto moiety was readily obtained through a one-pot stereospecific intramolecular nucleophilic displacement on an easily available 3-O-pivaloyl-D-gluco precursor,and the L-IdoA moiety through selective radical oxidation at C-6 of a L-ido 4,6-diol derivative with oxoammonium salts. (C) 2002 Elsevier Science Ltd. All rights reserved.

  DOI：

  10.1016/s0008-6215(02)00060-5