[EN] PENTAHETEROCYCLIC COMPOUND, PREPARATION METHOD THEREFOR AND USE THEREOF [FR] COMPOSÉ PENTAHÉTÉROCYCLIQUE, SON PROCÉDÉ DE PRÉPARATION ET SON UTILISATION [ZH] 五并杂环类化合物、其制备方法及其应用
Asymmetric Synthesis of Dialkyloxy-3-alkylammonium Cationic Lipids
作者:Christopher A. Hurley、John B. Wong、Helen C. Hailes、Alethea B. Tabor
DOI:10.1021/jo035422g
日期:2004.2.1
The cationic diether-linked cytofectin DOTMA (available commercially as a mixture, Lipofectin comprised of DOTMA:DOPE, 1:1) and analogues including DIMRIE and DORIE are frequently used for in vitro and in vivo transfections. Despite this wide usage direct synthetic routes to the optical isomers have received little attention to date. Here we describe strategies to synthesize enantiomers of DOTMA and analogues, including an extremely concise procedure to the trimethylammonium salts. One strategy utilized N-protection, as the imine, with concomitant ether formation and deprotection during the workup. Methylation of the 1-amino-2,3-dialkyloxypropane then generated the trimethylammonium cationic lipids directly. This methodology was extended to synthesize a novel headgroup functionalized lipid. A second route was also developed using an alternative chiral synthon.
[EN] STABLE CRYSTAL MODIFICATIONS OF DOTAP CHLORIDE<br/>[FR] MODIFICATIONS CRISTALLINES STABLES DE CHLORURE DE DOTAP