NeuAc(a2-3)Gal(b1-4)Xyl(b)-O-EtTMS | 197143-88-7

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: NeuAc(a2-3)Gal(b1-4)Xyl(b)-O-EtTMS
• 英文别名: (2S,4S,5R,6R)-5-acetamido-2-[(2S,3R,4S,5S,6R)-2-[(3R,4R,5R,6S)-4,5-dihydroxy-6-(2-trimethylsilylethoxy)oxan-3-yl]oxy-3,5-dihydroxy-6-(hydroxymethyl)oxan-4-yl]oxy-4-hydroxy-6-[(1R,2R)-1,2,3-trihydroxypropyl]oxane-2-carboxylic acid
• CAS: 197143-88-7
• 化学式: C₂₇H₄₉NO₁₈Si
• 分子量: 703.767
• InChiKey: RSHJCMVHFPIOOF-ITDVWHJNSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -5.22
• 重原子数：
  47
• 可旋转键数：
  14
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.93
• 拓扑面积：
  304
• 氢给体数：
  11
• 氢受体数：
  18

反应信息

• 作为反应物：
  描述：

  NeuAc(a2-3)Gal(b1-4)Xyl(b)-O-EtTMS 在 溶剂黄146 作用下， 生成 2-(trimethylsilyl)ethyl 4-O-[3-O-(5-acetamido-3,5-dideoxy-D-glycero-α-D-galacto-2-nonulopyranosyloyl-1''->2'-lactone)-β-D-galactopyranosyl]-β-D-xylopyranoside 、
  参考文献：
  名称：

  Synthesis of XylβCer, Galβ1−4XylβCer, NeuAcα2−3Galβ1−4XylβCer and the Corresponding Lactone and Lactam Trisaccharides

  摘要：

  2-(Trimethylsilyl)ethyl 2-O-benzoyl- and 2,3-di-O-acetyl-beta-D-xylopyranosides (12 and 14) were synthesized in high yields and subjected to glycosylation with various glycosyl donors. Galactosylation of 12 gave the xylose analogue of TMSEt lactoside (3), which was transformed into the glycosyl acceptor 19. Sialylation then gave the xylose analogue of G(M3) trisaccharide (5). The TMSEt glycosides 10, 25, and 32 were transformed into the corresponding trichloroacetimidates, which were used for glycosylation of an azidosphingosine derivative. The resulting sphingosyl glycosides were transformed into the title ceramides. Treatment of NeuAc alpha 2-3Gal beta 1-4Xyl beta Cer (5) with acetic acid gave the corresponding l''-2'-lactone 7. Glycosylation of 12 or 14 with a G(M4)-lactam donor (40) gave the xylose analogue of G(M3)-lactam (42). There was a 3-fold increase in the formation of GAG chains in the presence of 0.5 mu M Xyl beta Cer (2) in the medium.

  DOI：

  10.1021/jo970298k
• 作为产物：
  描述：

  phenyl 2,3,4,6-tetra-O-benzoyl-1-thio-β-D-galactopyranoside 在 4-二甲氨基吡啶 、 sodium hydroxide 、 N-碘代丁二酰亚胺 、 甲磺酰溴 、 三氟甲磺酸 、 MS 300AW 、 sodium methylate 、 silver trifluoromethanesulfonate 、 对甲苯磺酸 、 溶剂黄146 、 二异丙胺 作用下， 以 吡啶 、 水 为溶剂， 反应 28.5h， 生成 NeuAc(a2-3)Gal(b1-4)Xyl(b)-O-EtTMS
  参考文献：
  名称：

  Synthesis of XylβCer, Galβ1−4XylβCer, NeuAcα2−3Galβ1−4XylβCer and the Corresponding Lactone and Lactam Trisaccharides

  摘要：

  2-(Trimethylsilyl)ethyl 2-O-benzoyl- and 2,3-di-O-acetyl-beta-D-xylopyranosides (12 and 14) were synthesized in high yields and subjected to glycosylation with various glycosyl donors. Galactosylation of 12 gave the xylose analogue of TMSEt lactoside (3), which was transformed into the glycosyl acceptor 19. Sialylation then gave the xylose analogue of G(M3) trisaccharide (5). The TMSEt glycosides 10, 25, and 32 were transformed into the corresponding trichloroacetimidates, which were used for glycosylation of an azidosphingosine derivative. The resulting sphingosyl glycosides were transformed into the title ceramides. Treatment of NeuAc alpha 2-3Gal beta 1-4Xyl beta Cer (5) with acetic acid gave the corresponding l''-2'-lactone 7. Glycosylation of 12 or 14 with a G(M4)-lactam donor (40) gave the xylose analogue of G(M3)-lactam (42). There was a 3-fold increase in the formation of GAG chains in the presence of 0.5 mu M Xyl beta Cer (2) in the medium.

  DOI：

  10.1021/jo970298k

文献信息

• Synthesis of XylβCer, Galβ1−4XylβCer, NeuAcα2−3Galβ1−4XylβCer and the Corresponding Lactone and Lactam Trisaccharides
  作者：Michael Wilstermann、Göran Magnusson

  DOI：10.1021/jo970298k

  日期：1997.11.1

  2-(Trimethylsilyl)ethyl 2-O-benzoyl- and 2,3-di-O-acetyl-beta-D-xylopyranosides (12 and 14) were synthesized in high yields and subjected to glycosylation with various glycosyl donors. Galactosylation of 12 gave the xylose analogue of TMSEt lactoside (3), which was transformed into the glycosyl acceptor 19. Sialylation then gave the xylose analogue of G(M3) trisaccharide (5). The TMSEt glycosides 10, 25, and 32 were transformed into the corresponding trichloroacetimidates, which were used for glycosylation of an azidosphingosine derivative. The resulting sphingosyl glycosides were transformed into the title ceramides. Treatment of NeuAc alpha 2-3Gal beta 1-4Xyl beta Cer (5) with acetic acid gave the corresponding l''-2'-lactone 7. Glycosylation of 12 or 14 with a G(M4)-lactam donor (40) gave the xylose analogue of G(M3)-lactam (42). There was a 3-fold increase in the formation of GAG chains in the presence of 0.5 mu M Xyl beta Cer (2) in the medium.