1-O-(3'',7'',11'',15''-tetramethyldecyl)-6-O-(2',3',4',6'-tetra-O-acetyl-α-D-galactopyranosyl)-2,3,4-tri-O-acetyl-β-D-glucopyranoside | 845523-24-2

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 脂肪酰基
• 英文名称: 1-O-(3'',7'',11'',15''-tetramethyldecyl)-6-O-(2',3',4',6'-tetra-O-acetyl-α-D-galactopyranosyl)-2,3,4-tri-O-acetyl-β-D-glucopyranoside
• 英文别名: 1-O-(3",7",11",15"-tetramethyldecyl)-6-O-(2',3',4',6'-tetra-O-acetyl-α-D-galactopyranosyl)-2,3,4-tri-O-acetyl-β-D-glucopyranoside
• CAS: 845523-24-2
• 化学式: C₄₆H₇₆O₁₈
• 分子量: 917.099
• InChiKey: OAWNZRRGIVGDQO-RLVBCOBQSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  6.09
• 重原子数：
  64.0
• 可旋转键数：
  27.0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.85
• 拓扑面积：
  221.02
• 氢给体数：
  0.0
• 氢受体数：
  18.0

反应信息

• 作为反应物：
  描述：

  1-O-(3'',7'',11'',15''-tetramethyldecyl)-6-O-(2',3',4',6'-tetra-O-acetyl-α-D-galactopyranosyl)-2,3,4-tri-O-acetyl-β-D-glucopyranoside 在 sodium methylate 作用下， 以 甲醇 为溶剂， 反应 3.0h， 以91%的产率得到1-O-((3",7",11",15")-tetramethyldecyl)-6-O-(α-D-galactopyranosyl)-β-D-glucopyranoside
  参考文献：
  名称：

  Comparison of the Supramolecular Structures of Two Glyco Lipids with Chiral and Nonchiral Methyl-Branched Alkyl Chains from Natural Sources

  摘要：

  Two alkyl glycosides with the same type of disaccharide headgroups (melibiose) and different methyl-branched alkyl chains, short chiral [(2R,4R,6R,8R)-2,4,6,8-tetramethyldecyl, extracted from an animal source] and long nonchiral (3,7,11,15-tetramethylhexadecyl, from a plant source), were synthesized. The supramolecular aggregate structure formed in dilute solutions was investigated by small-angle neutron scattering and surface tension measurements. The lyotropic phase diagram was studied by differential scanning calorimetry and water penetration scans. The thermotropic phase behavior was investigated by polarizing microscopy. The compounds showed unusual phase behavior: (i) The liquid-crystalline polymorphism is reduced to only form smectic A phases in the pure state; the formation of lyotropic phases such as hexagonal or lamellar phases was not observed. (ii) The compound with the longer nonchiral alkyl chain is more soluble in water than the one with the shorter chiral chain, most likely because of the different flexibilities of the chains. (iii) For the long-chain compound, the formation of micelles is observed, whereas the short-chain compound forms large disklike/bilayer aggregates. The method of methylation of the chain controls the self-assembly and can explain different biological functions for either plants (variable temperature) or animals (constant temperature).

  DOI：

  10.1021/jp0460238
• 作为产物：
  描述：

  叶绿醇 在 三氟化硼乙醚 、 氢气 作用下， 以 二氯甲烷 为溶剂， 反应 6.0h， 生成 1-O-(3'',7'',11'',15''-tetramethyldecyl)-6-O-(2',3',4',6'-tetra-O-acetyl-α-D-galactopyranosyl)-2,3,4-tri-O-acetyl-β-D-glucopyranoside
  参考文献：
  名称：

  Comparison of the Supramolecular Structures of Two Glyco Lipids with Chiral and Nonchiral Methyl-Branched Alkyl Chains from Natural Sources

  摘要：

  Two alkyl glycosides with the same type of disaccharide headgroups (melibiose) and different methyl-branched alkyl chains, short chiral [(2R,4R,6R,8R)-2,4,6,8-tetramethyldecyl, extracted from an animal source] and long nonchiral (3,7,11,15-tetramethylhexadecyl, from a plant source), were synthesized. The supramolecular aggregate structure formed in dilute solutions was investigated by small-angle neutron scattering and surface tension measurements. The lyotropic phase diagram was studied by differential scanning calorimetry and water penetration scans. The thermotropic phase behavior was investigated by polarizing microscopy. The compounds showed unusual phase behavior: (i) The liquid-crystalline polymorphism is reduced to only form smectic A phases in the pure state; the formation of lyotropic phases such as hexagonal or lamellar phases was not observed. (ii) The compound with the longer nonchiral alkyl chain is more soluble in water than the one with the shorter chiral chain, most likely because of the different flexibilities of the chains. (iii) For the long-chain compound, the formation of micelles is observed, whereas the short-chain compound forms large disklike/bilayer aggregates. The method of methylation of the chain controls the self-assembly and can explain different biological functions for either plants (variable temperature) or animals (constant temperature).

  DOI：

  10.1021/jp0460238