Perfluoroalkyl bile esters: a new class of efficient gelators of organic and aqueous–organic media
作者:Supratim Banerjee、V. M. Vidya、A. J. Savyasachi、Uday Maitra
DOI:10.1039/c1jm11912e
日期:——
A new class of fluorinated gelators derived from bile acids is reported. Perfluoroalkyl chains were attached to the bile acids through two different ester linkages and were synthesized following simple transformations. The gelation property of these derivatives is a function of the bile acid moiety, the spacer and the fluoroalkyl chain length. By varying these parameters, gels were obtained in aromatic hydrocarbons, DMSO and DMSO/DMFâH2O mixtures of different proportions. Several derivatives of deoxycholic and lithocholic acids were found to be efficient organogelators, while the reported bile-acid based organogelators are mostly derived from the cholic acid moiety. The efficient gelators among these compounds formed gels well below 1.0% (w/v) and hence they can be termed as supergelators. The mechanical properties of these gels could be modulated by changing either the bile acid moiety or by varying the length of the fluoroalkyl segment. The presence of CO2-philic perfluoroalkyl groups is also expected to enhance their solubility in supercritical CO2 and hence these compounds are promising candidates for making aerogels.
Fluorous Capping Reagents and Methods for Peptide Purification
申请人:Kumar Krishna
公开号:US20080275216A1
公开(公告)日:2008-11-06
Aspects of the present invention relate to compounds for preparing fluorocarbon compounds, methods for preparing fluorocarbon compounds, and methods for purifying a mixture of compounds. One aspect of the present invention relates to a trivalent iodonium fluorocarbon. The trivalent iodonium fluorocarbon compound of the invention is useful for attaching a fluorocarbon group to a compound that has a nucleophilic functional group. Another aspect of the present invention relates to a method of preparing a trivalent iodonium fluorocarbon. Another aspect of the present invention relates to a method of preparing a fluorocarbon by treating a compound bearing a nucleophilic functional group with a trivalent iodonium fluorocarbon compound. Another aspect of the present invention relates to a method or purifying a mixture comprising a first and a second compound by treating the mixture with a trivalent iodonium fluorocarbon to attach a fluorocarbon group to the second compound leaving the first compound unchanged, and purifying the mixture by fluorous-phase purification.
[EN] FLUOROUS CAPPING REAGENTS, AND METHODS FOR PEPTIDE PURIFICATION<br/>[FR] REACTIFS DE COIFFAGE FLUOREUX ET PROCEDES DE PURIFICATION DE PEPTIDES
申请人:TUFTS COLLEGE
公开号:WO2005118527A3
公开(公告)日:2007-01-25
US7612166B2
申请人:——
公开号:US7612166B2
公开(公告)日:2009-11-03
A Fluorous Capping Strategy for Fmoc-Based Automated and Manual Solid-Phase Peptide Synthesis
作者:Vittorio Montanari、Krishna Kumar
DOI:10.1002/ejoc.200500958
日期:2006.2
Just add water: Peptides synthesized by the use of standardized Fmoc protocols with commercial automated synthesizers can be purified from deletion products by simple centrifugation of aqueous solutions. The deletion products are capped with fluorous trivalent iodonium salts. At the end of the synthesis, the crude peptide is dissolved in water and centrifuged, and the deletion products precipitate