Hydroxyl-Terminated Dendritic Oligomers from Bile Acids: Synthesis and Properties
摘要:
[GRAPHICS]The high reactivity of the chloroacetyl group has been exploited for the synthesis of bile acid based first and second generation dendrons with multiple hydroxyl groups. The synthesis involves only a few steps and avoids the use of protecting groups for the terminal hydroxyl groups. These dendritic structures with facially amphiphilic bile acid backbones on the periphery were able to solubilize cresol red, a hydrophilic dye, in a nonpolar solvent. HPLC analysis of the dendrons suggests that hydrophobicity increases with increase in oligomer size, but in each generation, the dendrons with a higher degree of branching are less hydrophobic.
Synthesis of Cholic Acid Oligomer-Taurine Conjugates: A Study of Their Aggregation and Cholesterol Solubilization
作者:T. B. N. Satyanarayana、Uday Maitra、A. J. Savyasachi
DOI:10.1002/ejoc.201200312
日期:2012.7
Taurine conjugates of two cholicacid derived oligomers with different spacers between the cholicacid units were synthesized. These molecules self-assemble in aqueous media. The critical micelle concentration (CMC) values were measured by using fluorescence spectroscopic analysis and the aggregates were characterized by dynamic light scattering and electron microscopy. The cooperativity of the cholic
Hydroxyl-Terminated Dendritic Oligomers from Bile Acids: Synthesis and Properties
作者:N. Vijayalakshmi、Uday Maitra
DOI:10.1021/jo052173i
日期:2006.1.1
[GRAPHICS]The high reactivity of the chloroacetyl group has been exploited for the synthesis of bile acid based first and second generation dendrons with multiple hydroxyl groups. The synthesis involves only a few steps and avoids the use of protecting groups for the terminal hydroxyl groups. These dendritic structures with facially amphiphilic bile acid backbones on the periphery were able to solubilize cresol red, a hydrophilic dye, in a nonpolar solvent. HPLC analysis of the dendrons suggests that hydrophobicity increases with increase in oligomer size, but in each generation, the dendrons with a higher degree of branching are less hydrophobic.