Synthése de nouveaux intermédiaires F-alkyles précurseurs de tensioactifs cationiques hautement fluorés
作者:A. Sismondi、P. Abenin、L. Joncheray、A. Cambon
DOI:10.1016/s0022-1139(00)80210-9
日期:1992.10
The syntheses of F-alkyl compounds such as(~)[GRAPHICS](~)(where R(F) = C4F9, C6F13, C8F17 and Q = S, O, NH) by the reaction of bromoacetyl bromide with an F-alkyl compound such as RFC2H4QH are reported. These compounds show high reactivity with nucelophilic substrates. They are intended for use as precursors of surfactants or as precursors of monomers for the elaboration of artificial vesicles.
Design and synthesis of perfluorinated amphiphilic copolymers: Smart nanomicelles for theranostic applications
作者:Mukesh K. Pandey、Rahul Tyagi、Ke Yang、Robert J. Fisher、Clark K. Colton、Jayant Kumar、Virinder S. Parmar、Eric Aiazian、Arthur C. Watterson
DOI:10.1016/j.polymer.2011.08.017
日期:2011.9
Since decades, varieties of amphiphilic polymers have been widely investigated for improving aqueous solubility and bioavailability of the hydrophobic drugs. The upcoming approach is to develop more efficient advanced nano-carrier molecules capable of more than drug delivery. Herein, we report the design and synthesis of some novel carrier molecules with multiple applications including drug encapsulation, drug delivery and diagnosis (imaging). Copolymers were synthesized using dimethyl 5-hydroxy/aminoisophthalate, poly(ethylene glycols) and Candida antarctica lipase (CAL-B, Novozym 435). CAL-B selectively catalyses the trans esterification reaction under solvent less condition using primary hydroxyls of poly(ethylene glycols) and leaving behind phenolic hydroxyl for post polymerization modifications. The obtained copolymers were further tethered with perfluorinated aliphatic chains to make them amphiphilic. The synthesized materials were investigated for their micellar behavior, temperature dependent stability (in aqueous solution), encapsulation capacity, and imaging potential by measuring the sensitivity of these perfluorinated materials towards F-19 NMR in NMR tube. It was observed that perfluorinated amphiphilic copolymers could encapsulate up to 14% (by wt) of hydrophobic drug and showed decent F-19 NMR signals even at a very low concentration. Therefore, these perfluorinated copolymers hold considerable potential for further investigation as advanced nano-carrier molecules for biomedical applications. (C) 2011 Elsevier Ltd. All rights reserved.