ethyl 2,4,6-tri-O-benzyl-3-O-(carboxyacetyl)-1-thio-α-D-mannopyranoside | 316188-21-3

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: ethyl 2,4,6-tri-O-benzyl-3-O-(carboxyacetyl)-1-thio-α-D-mannopyranoside
• 英文别名: 3-[(2R,3S,4S,5R,6R)-2-ethylsulfanyl-3,5-bis(phenylmethoxy)-6-(phenylmethoxymethyl)oxan-4-yl]oxy-3-oxopropanoic acid
• CAS: 316188-21-3
• 化学式: C₃₂H₃₆O₈S
• 分子量: 580.699
• InChiKey: PUWUZHGKPJYPEN-GIMGQEMRSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.9
• 重原子数：
  41
• 可旋转键数：
  16
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.38
• 拓扑面积：
  126
• 氢给体数：
  1
• 氢受体数：
  9

反应信息

• 作为反应物：
  描述：

  ethyl 2,4,6-tri-O-benzyl-3-O-(carboxyacetyl)-1-thio-α-D-mannopyranoside 在 盐酸 、 4-二甲氨基吡啶 、 3 Angstroem MS 、 sodium cyanoborohydride 、 N,N'-二环己基碳二亚胺 作用下， 以 四氢呋喃 、 乙醚 、 二氯甲烷 为溶剂， 反应 24.0h， 生成 benzyl 2-O-benzoyl-6-O-benzyl-3-O-[3-(ethyl 2,4,6-tri-O-benzyl-1-thio-α-D-mannopyranosid-3-O-yl)-1,3-dioxopropyl]-α-D-glucopyranoside
  参考文献：
  名称：

  摘要：

  A series of prearranged glycosides 5, 17, 23, 28, 37 and 41, having a benzyl-protected 1-thiomannosyl donor linked through its positions 2, 3, 4 and 6 via succinate and malonate tethers, respectively, to positions 2, 3, and 6 of a benzyl glucopyranoside acceptor, were prepared by condensation of the respective mannosyl succinates and malonates with suitably protected benzyl glucopyranosides. The prearranged glycosides were intramolecularly coupled under various conditions to give the corresponding, tethered (1 --> 4)-linked disaccharides The yields and anomer ratios of the products of these couplings were interpreted in terms of the thermodynamic stability of the resulting disaccharides. In the case of prearranged glycoside 17, having positions 3 of both the donor and the acceptor linked by a succinate tether, a strong dependence of the diastereoselectivity of the intramolecular glycosylation on the activation procedure was observed. All other cases did not show a significant dependence of the outcome of the anomeric configuration in intramolecular glycosylation on the activation procedure or the solvent.

  DOI：

  10.1002/1522-2675(20001004)83:10<2655::aid-hlca2655>3.0.co;2-u
• 作为产物：
  描述：

  ethyl 2,3-di-O-isopropylidene-1-thio-α-D-mannopyranoside 在 sodium hydroxide 、 四丁基硫酸氢铵 、 sodium hydride 、 1-羟基苯并三唑 、 溶剂黄146 、 N,N'-二环己基碳二亚胺 、 三氟乙酸 作用下， 以 二氯甲烷 、 水 、 N,N-二甲基甲酰胺 为溶剂， 反应 79.5h， 生成 ethyl 2,4,6-tri-O-benzyl-3-O-(carboxyacetyl)-1-thio-α-D-mannopyranoside
  参考文献：
  名称：

  摘要：

  A series of prearranged glycosides 5, 17, 23, 28, 37 and 41, having a benzyl-protected 1-thiomannosyl donor linked through its positions 2, 3, 4 and 6 via succinate and malonate tethers, respectively, to positions 2, 3, and 6 of a benzyl glucopyranoside acceptor, were prepared by condensation of the respective mannosyl succinates and malonates with suitably protected benzyl glucopyranosides. The prearranged glycosides were intramolecularly coupled under various conditions to give the corresponding, tethered (1 --> 4)-linked disaccharides The yields and anomer ratios of the products of these couplings were interpreted in terms of the thermodynamic stability of the resulting disaccharides. In the case of prearranged glycoside 17, having positions 3 of both the donor and the acceptor linked by a succinate tether, a strong dependence of the diastereoselectivity of the intramolecular glycosylation on the activation procedure was observed. All other cases did not show a significant dependence of the outcome of the anomeric configuration in intramolecular glycosylation on the activation procedure or the solvent.

  DOI：

  10.1002/1522-2675(20001004)83:10<2655::aid-hlca2655>3.0.co;2-u