Synthesis of nonionic reduced-sugar based bola amphiphiles and gemini surfactants with an α,ω-diamino-(oxa)alkyl spacer
作者:Anno Wagenaar、Jan B.F.N. Engberts
DOI:10.1016/j.tet.2007.08.023
日期:2007.10
Reduced-sugar based gemini surfactants with an alpha,omega-diamino-(oxa) alkyl spacer exhibit a rich pH-dependent aggregation behavior and are efficient DNA carriers in gene transfection. Herein, we describe an improved synthetic procedure for these amphiphiles. First, a series of novel nonionic bolaform amphiphiles with identical headgroups and alpha,omega-diamino-(oxa) alkyl spacers were synthesized by reductive aminations involving alpha,omega-diaminoalkanes and the appropriate sugars or aldehydes. The bolaform compounds were used as starting materials for the synthesis of the corresponding reduced-sugar based gemini surfactants in a reductive alkylation reaction employing a polymer-bound cyanoborohydride. A series of new gemini surfactants have been synthesized and characterized. (C) 2007 Elsevier Ltd. All rights reserved.
The Reaction of Glucose with Some Amines
作者:Eleanor Mitts、R. M. Hixon
DOI:10.1021/ja01231a055
日期:1944.3
Reductive amination of aldohexoses with mono- and bifunctional alkyl amines: conversion of carbohydrates into EDTA type complexing agents
作者:Hendrik Lammers、Joop A. Peters、Herman van Bekkum
DOI:10.1016/s0040-4020(01)85293-5
日期:1994.1
It is shown by H-1 and C-13 NMR spectroscopy (1D and 2D) that beta-N-propylgalactosylamine (5a) is the major species present in an equimolar aqueous solution of D-galactose (1a) and propylamine (PA). In equimolar solutions of aldohexoses (1a-c) and ethylenediamine (EN) or 1,3-diaminopropane (DAP) in addition to mono- (9) and diglycosylamines (12) tetra-imidazole (8, n=1) and hexahydropyrimidine derivatives (8, n=2), respectively, are formed. Hydrogenation of equimolar solutions of aldohexoses (1a-c) and primary amines (PA, EN, and DAP) at 100 atm. and 50 degrees C, using 5% Pt on carbon as the catalyst, gave amino sugars 13-16 in good yields. Carboxymethylation of 14a-b resulted in sugar based EDTA type complexing agents (17a-b) with promising chelating abilities towards Cd(II) and Ca(II) at high pH.
Gemini glycidyl ether adducts of polyhydroxyalkyl alkylenediamines
申请人:AIR PRODUCTS AND CHEMICALS, INC.
公开号:EP1457481B1
公开(公告)日:2007-05-23
Supramolecular Chemistry, 62. Ligand and Cosubstrate Effects on the Hydrolysis of Phosphate Esters and DNA with Lanthanoids
作者:Jörg Rammo、Hans-Jörg Schneider
DOI:10.1002/jlac.199619961109
日期:1996.11
an increasing number of nucleophilic groups or by attaching corresponding polyols covalently to stronger metal-binding centers like diazacrown ethers. Although the kinetic effects on the hydrolysis of bis(4-nitrophenyl) phosphate (BNPP) and of super-coiled plasmid DNA are only moderate, their dependence on cosubstrate structure and polyol configuration unambiguously demonstrates that these are involved