97546-33-3Relevant academic research and scientific papers
Synthesis of new lipophilic acyclic di-ionizable polyethers, bis(crown ethers) and macrocyclic diamides
Elshani, Sadik,Wai, Chien M.,Natale,Bartsch, Richard A.
, p. 9425 - 9438 (2007/10/03)
A series of new lipophilic acyclic polyethers containing two carboxylic or hydroxamic acid groups have been prepared. From lipophilic acyclic polyether dicarboxylic acids 2, 9 and 13, the bis(crown ethers) 20-25 were synthesized. From lipophilic acyclic polyether dicarboxylic acids 10-12 and 14, the new macrocyclic diamides 26-32 were prepared in high yields without the use of high dilution techniques or template effects.
Calix[4]arene dibenzocrown ethers as caesium selective extractants
Kim, Jong Seung,Pang, Jin Hyun,Yu, Ill Yong,Lee, Won Ku,Suh, Il Hwan,Kim, Jong Kuk,Cho, Moon Hwan,Kim, Eun Tae,Ra, Do Young
, p. 837 - 846 (2007/10/03)
A series of 1,3-dialkyloxycalix[4]arene dibenzocrown ethers were synthesized in the fixed 1,3-alternate conformation with good yields by the reaction of 1,3-dialkyloxycalix[4]arenes with dibenzodimesylate in the presence of caesium carbonate. The three dimensional 1,3-alternate conformation was confirmed by X-ray crystal structure. Upon two phase extraction, NMR studies on the ligand-metal complex, single ion and competitive ion transport experiments through a bulk liquid membrane, 1,3-dipropyloxycalix[4]arene dibenzocrown-6, in which two benzo groups are symmetrically attached to the crown-6 linkage, gave one of the most efficient and selective extractabilities for caesium ion over other alkali metal ions. From supported liquid membrane experiments using 1 and 3 as organic carriers, permeation coefficients of the caesium ion were estimated to be 0.42 and 0.27 cm h-1, respectively. The selectivity of caesium over sodium ion was observed to increase with permeation time.
Studies on complexation of alkaline earth metal cations with acyclic polyether dicarboxylic acids
Kim,Lee,Kim,Cho,Cho,Lee
, p. 1072 - 1075 (2007/10/03)
Acyclic polyether dicarboxylic acids having butyl and tetradecyl side alkyl chains at the α-position of the carboxylic acid sidearm unit were prepared by the reaction of bisphenol and 2-bromoalkanoic acid in the presence of sodium hydride with quantitativ
Calcium ionophores as cardiac stimulants. I. Diacids derived from dibenzo crown ethers
Ball,Cooper,Main
, p. 137 - 143 (2007/10/02)
A series of calcium chelating agents has been prepared based on carboxylic derivatives of open chain 18-Crown-6 analogues. Most of these are efficient calcium binding agents, many form lipophilic calcium complexes, and some of these are capable of releasing Ca2+ from liposomes by ionophore action. The best of these is 1,2-bis-[2-(1-carboxydecyloxy)phenoxy]ethane. This compound is cardiotonic in vitro but in the dog vasoconstriction it is the predominant biological effect.
