Methyl 4,6-O-(1,1,3,3-tetraisopropyldisiloxane-1,3-dily)-β-D-glucopyranoside | 145259-79-6

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: Methyl 4,6-O-(1,1,3,3-tetraisopropyldisiloxane-1,3-dily)-β-D-glucopyranoside
• 英文别名: methyl 4,6-di-O-(1,1,3,3-tetraisopropyldisilaxonylidene)-β-D-glucopyranoside；(6aR,8R,9R,10R,10aS)-8-methoxy-2,2,4,4-tetra(propan-2-yl)-6,6a,8,9,10,10a-hexahydropyrano[3,2-f][1,3,5,2,4]trioxadisilocine-9,10-diol
• CAS: 145259-79-6
• 化学式: C₁₉H₄₀O₇Si₂
• 分子量: 436.693
• InChiKey: ZDJWUBKMQQAWOE-FVVUREQNSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.04
• 重原子数：
  28
• 可旋转键数：
  5
• 环数：
  2.0
• sp3杂化的碳原子比例：
  1.0
• 拓扑面积：
  86.6
• 氢给体数：
  2
• 氢受体数：
  7

反应信息

• 作为反应物：
  描述：

  Methyl 4,6-O-(1,1,3,3-tetraisopropyldisiloxane-1,3-dily)-β-D-glucopyranoside 在 吡啶 、 三氟甲磺酸三甲基硅酯 作用下， 以 二氯甲烷 为溶剂， 反应 24.0h， 生成 methyl 2,3-di-O-benzoyl-4,6-O-<(S)-1-(methoxycarbonyl)ethylidene>-α-D-glucopyranoside
  参考文献：
  名称：

  Convenient Synthesis of 4,6-O-Pyruvate Acetal Containing Glycosides via Tetraisopropyldisiloxanediyl Protected Sugars

  摘要：

  烷基 D-吡喃葡糖苷和烷基或苯基1-硫-ß-D-吡喃葡糖苷 1 与1,3-二氯-1,1,3,3-四异丙基二硅氧烷反应，得到相应的4,6-O-(1,1,3,3-四异丙基二硅氧烷-1,3-二基)保护的糖苷 2，随后用苯甲酰溴进行苯甲酰化，得到完全保护的糖苷 3。后者与丙酮酸甲酯和少量三甲基硅基三氟甲磺酸酯反应，以高非对映选择性得到烷基和苯基4,6-O-[1-(甲氧羰基)乙叉]吡喃葡糖苷 4。

  DOI：

  10.1055/s-1992-26291
• 作为产物：
  描述：

  1,3二氯-1,1,3,3-四异丙基二硅氧烷 、 甲基 Β-D-吡喃葡萄糖苷 在 咪唑 作用下， 以 N,N-二甲基甲酰胺 为溶剂， 反应 1.0h， 以88%的产率得到Methyl 4,6-O-(1,1,3,3-tetraisopropyldisiloxane-1,3-dily)-β-D-glucopyranoside
  参考文献：
  名称：

  Convenient Synthesis of 4,6-O-Pyruvate Acetal Containing Glycosides via Tetraisopropyldisiloxanediyl Protected Sugars

  摘要：

  烷基 D-吡喃葡糖苷和烷基或苯基1-硫-ß-D-吡喃葡糖苷 1 与1,3-二氯-1,1,3,3-四异丙基二硅氧烷反应，得到相应的4,6-O-(1,1,3,3-四异丙基二硅氧烷-1,3-二基)保护的糖苷 2，随后用苯甲酰溴进行苯甲酰化，得到完全保护的糖苷 3。后者与丙酮酸甲酯和少量三甲基硅基三氟甲磺酸酯反应，以高非对映选择性得到烷基和苯基4,6-O-[1-(甲氧羰基)乙叉]吡喃葡糖苷 4。

  DOI：

  10.1055/s-1992-26291

文献信息

• Ziegler, Thomas; Eckhardt, E.; Pantkowski, G., Journal of Carbohydrate Chemistry, 1994, vol. 13, # 1, p. 81 - 110
  作者：Ziegler, Thomas、Eckhardt, E.、Pantkowski, G.

  DOI：——

  日期：——
• Hydroxymethyl Rotamer Populations in Disaccharides
  作者：Alfredo Roën、Juan I. Padrón、Jesús T. Vázquez

  DOI：10.1021/jo026913o

  日期：2003.6.1

  Sixteen methyl glucopyranosyl glucopyranoside disaccharides (methyl beta-D-Glcp(p-Br-Bz)-(1-->alpha)-beta/alpha-D-Glcp) containing beta-glycosidic linkages (1-->2, 1-->3, 1-->4, and 1-->6) were synthesized and analyzed by means of CD and NMR spectroscopy in three different solvents. For each of these four types of disaccharides, a correlation was observed between the hydroxymethyl rotational populations around the C5-C6 bond of the glucopyranosyl residue II with the substituents and the anomeric configuration of the methoxyl group in residue I, as well as with the solvent. Nonbonded interactions, the stereoelectronic exo-anomeric effect, and hydrogen bonding were found to be responsible for the observed rotameric differences. Whereas the rotational populations of the (1-->6)-linked disaccharides are mainly dependent on the exo-anomeric effect, the (1-->2)-bonded disaccharides are strongly dependent on the anomeric configuration at C1, and the (1-->3)- and (1-->4)-linked disaccharides are mainly dependent on the substituents and the solvent. The population of the gt rotamer decreases as nonbonded interactions increase but increases as the exo-anomeric effect becomes greater, as well as in the presence of intramolecular hydrogen bonding to the endocyclic oxygen O5'. Comparison of the hydroxymethyl rotational preferences between our model disaccharides revealed a dependence on the glycosidic linkage type. Thus the population of the gg and gt rotamers decreases/increases from (1-->2)-(beta series), to (1-->6)-, to (1-->2)-(alpha series), to (1-->4)-, and to (1-->3)-bonded disaccharides respectively, while the tg rotamer population remains almost constant (around 20%), except for the (1-->3)- and (1-->4)-linked disaccharides with the intramolecular hydrogen bonding to O5', where this population decreases to 10%.