(4R)-4-[(3R,5S,7R,8R,9S,10S,12S,13R,14S,17R)-3-[[(4R)-4-[(3R,5S,7R,8R,9S,10S,12S,13R,14S,17R)-3-azido-7,12-dihydroxy-10,13-dimethyl-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl]pentanoyl]amino]-7,12-dihydroxy-10,13-dimethyl-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl]pentanoic acid | 947179-65-9

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 类固醇和类固醇衍生物
• 英文名称: (4R)-4-[(3R,5S,7R,8R,9S,10S,12S,13R,14S,17R)-3-[[(4R)-4-[(3R,5S,7R,8R,9S,10S,12S,13R,14S,17R)-3-azido-7,12-dihydroxy-10,13-dimethyl-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl]pentanoyl]amino]-7,12-dihydroxy-10,13-dimethyl-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl]pentanoic acid
• CAS: 947179-65-9
• 化学式: C₄₈H₇₈N₄O₇
• 分子量: 823.17
• InChiKey: OPAJBELAXNGSBW-NVXUSUEZSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  8.9
• 重原子数：
  59
• 可旋转键数：
  10
• 环数：
  8.0
• sp3杂化的碳原子比例：
  0.96
• 拓扑面积：
  162
• 氢给体数：
  6
• 氢受体数：
  9

反应信息

• 作为反应物：
  描述：

  4-{3-[4-(3-amino-7,12-dihydroxy-10,13-dimethyl-hexadecahydro-cyclopenta[a]phenanthren-17-yl)-pentanoylamino]-7,12-dihydroxy-10,13-dimethyl-hexadecahydro-cyclopenta[a]phenanthren-17-yl}-pentanoic acid methyl ester 、 (4R)-4-[(3R,5S,7R,8R,9S,10S,12S,13R,14S,17R)-3-[[(4R)-4-[(3R,5S,7R,8R,9S,10S,12S,13R,14S,17R)-3-azido-7,12-dihydroxy-10,13-dimethyl-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl]pentanoyl]amino]-7,12-dihydroxy-10,13-dimethyl-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl]pentanoic acid 在 (benzotriazo-1-yloxy)tris(dimethylamino)phosphonium hexafluorophosphate 、 N,N-二异丙基乙胺 作用下， 以 N,N-二甲基甲酰胺 为溶剂， 以74%的产率得到
  参考文献：
  名称：

  Oligomeric Cholates:  Amphiphilic Foldamers with Nanometer-Sized Hydrophilic Cavities

  摘要：

  The hydroxyl at the C-3 of cholic acid was converted to an amino group, and the resulting aminofunctionalized cholic acid was used as a monomer to prepare amide-linked oligomeric cholates. These cholate oligomers fold into helical structures with nanometer-sized hydrophilic internal cavities in solvent mixtures consisting of mostly nonpolar solvents such as carbon tetrachloride or ethyl acetate/hexane and 2-5% of a polar solvent such as methanol or DMSO. The conformations of the foldamers; were studied by UV, fluorescence, fluorescence quenching, and fluorescence resonance energy transfer. The nature of the polar/nonpolar solvents and their miscibility strongly influenced the folding reaction. Folding was cooperative, as evidenced by the sigmoidal curves in solvent denaturation experiments. The folded conformers became more stable with an increase in the chain length. The folding/unfolding equilibrium was highly sensitive toward the amount of polar solvent. One percent variation in the solvent composition could change the folding free energies by 0.5-1.4 kcal/mol.

  DOI：

  10.1021/ja056151p
• 作为产物：
  描述：

  胆酸甲酯 在 lithium hydroxide 、 sodium azide 、 偶氮二甲酸二异丙酯 、 水 、 (benzotriazo-1-yloxy)tris(dimethylamino)phosphonium hexafluorophosphate 、 N,N-二异丙基乙胺 、 三苯基膦 作用下， 以 四氢呋喃 、 甲醇 、 N,N-二甲基甲酰胺 为溶剂， 反应 33.0h， 生成 (4R)-4-[(3R,5S,7R,8R,9S,10S,12S,13R,14S,17R)-3-[[(4R)-4-[(3R,5S,7R,8R,9S,10S,12S,13R,14S,17R)-3-azido-7,12-dihydroxy-10,13-dimethyl-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl]pentanoyl]amino]-7,12-dihydroxy-10,13-dimethyl-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl]pentanoic acid
  参考文献：
  名称：

  Oligomeric Cholates:  Amphiphilic Foldamers with Nanometer-Sized Hydrophilic Cavities

  摘要：

  The hydroxyl at the C-3 of cholic acid was converted to an amino group, and the resulting aminofunctionalized cholic acid was used as a monomer to prepare amide-linked oligomeric cholates. These cholate oligomers fold into helical structures with nanometer-sized hydrophilic internal cavities in solvent mixtures consisting of mostly nonpolar solvents such as carbon tetrachloride or ethyl acetate/hexane and 2-5% of a polar solvent such as methanol or DMSO. The conformations of the foldamers; were studied by UV, fluorescence, fluorescence quenching, and fluorescence resonance energy transfer. The nature of the polar/nonpolar solvents and their miscibility strongly influenced the folding reaction. Folding was cooperative, as evidenced by the sigmoidal curves in solvent denaturation experiments. The folded conformers became more stable with an increase in the chain length. The folding/unfolding equilibrium was highly sensitive toward the amount of polar solvent. One percent variation in the solvent composition could change the folding free energies by 0.5-1.4 kcal/mol.

  DOI：

  10.1021/ja056151p

文献信息

• Hydrogen bond-assisted macrocyclic oligocholate transporters in lipid membranes
  作者：Lakmini Widanapathirana、Xueshu Li、Yan Zhao

  DOI：10.1039/c2ob25301a

  日期：——

  Three macrocyclic oligocholates containing a carboxyl group, a guanidinium ion, and a Cbz-protected amine, respectively, were studied as membrane transporters for hydrophilic molecules. To permeate glucose across lipid bilayers, the macrocycles stacked over one another to form a transmembrane nanopore, driven by a strong tendency of the water molecules in the internal cavities of the amphiphilic macrocycles to aggregate in a nonpolar environment. To transport larger guests such as carboxyfluorescein (CF), the macrocycles acted as carriers to shuttle the guest across the membrane. Hydrogen-bonds between the side chains of the macrocycles strongly affected the transport properties. Surprisingly, the carboxyl group turned out to be far more effective at assisting the aggregation of the oligocholate macrocycles in the membrane than the much stronger carboxylate–guanidinium salt bridge, likely due to competition from the phosphate groups of the lipids for the guanidinium.

  研究人员研究了三种分别含有羧基、胍离子和Cbz保护胺的宏观环状低聚胆酸盐作为亲水分子膜转运蛋白的情况。为了使葡萄糖穿过脂质双分子层，宏观环状物相互堆叠形成跨膜纳米孔，这是由于两亲性宏观环状物内部空腔中的水分子在非极性环境中具有强烈的聚集趋势。为了运输较大的客体，如羧基荧光素（CF），宏观环状物充当载体，将客体运送到膜的另一侧。宏观环状物侧链之间的氢键对运输特性有强烈影响。令人惊讶的是，羧基在协助低聚胆酸盐宏观环状物在膜中聚集方面比强得多的羧酸盐-胍离子桥更有效，这可能是由于脂质的磷酸基团与胍离子竞争的结果。
• Spacer-Dependent Folding and Aggregation of Oligocholates in SDS Micelles
  作者：Yan Zhao

  DOI：10.1021/jo901651h

  日期：2009.10.2

  Insertion of flexible, 4-aminobutyroyl spacers in between the cholate repeat units had been found previously to enhance the folding of cholate oligomers in homogeneous solution (Zhao, Y.J. Org. Chem. 2009, 74, 834-843). The opposite effect was observed when the oligomers were solubilized in aqueous solutions of sodium dodecyl Sulfate (SIDS), The spacers enabled Formation of tight aggregates of the oligocholates in SDS solutions when the surfactant was below its critical micelle concentration (CMC). Above the CMC, SDS micelles formed and dissociated the oligocholate aggregates. The parent oligocholates (without spacers in between the repeat units) also aggregated when they were too short to fold (e.g., dimer). The longer tetramer and hexamer preferred to fold, as their rigid, awkwardly shaped backbones prevented tight packing needed in the formation of stable aggregates. Folding was favored both below and above the CMC of SDS and was enhanced by an increase in the chain length.
• Enhancing Binding Affinity by the Cooperativity between Host Conformation and Host–Guest Interactions
  作者：Zhenqi Zhong、Xueshu Li、Yan Zhao

  DOI：10.1021/ja203117g

  日期：2011.6.15

  Glutamate-functionalized oligocholate foldamers bound Zn(OAc)(2), guanidine, and even amine compounds with surprisingly high affinities. The conformational change of the hosts during binding was crucial to the enhanced binding affinity. The strongest cooperativity between the conformation and guest-binding occurred when the hosts were unfolded but near the folding-unfolding transition. These results suggest that high binding affinity in molecular recognition may be more easily obtained from large hosts capable of strong cooperative conformational changes instead of those with rigid, preorganized structures.
• Cholate−Glutamic Acid Hybrid Foldamer and Its Fluorescent Detection of Zn²⁺
  作者：Zhenqi Zhong、Yan Zhao

  DOI：10.1021/ol071130g

  日期：2007.7.1

  A hybrid foldamer containing six cholate units and two glutamic acids was labeled with two pyrenyl groups at the chain ends. Folding was particularly favorable in the presence of zinc(II), as shown by the enhanced emission of the pyrene excimer. The sensitivity of the detection depended on the relative population of the folded and unfolded conformers, being highest when about 90% of the foldamer was in the unfolded state.