2-Bromomethyl-2-methyl crownethers were prepared by intramolecularbromoalkoxylation of oligoethylene glycol monomethylallyl ethers using N-bromo-succinimide.
Certain host molecules having electrondonating sidearm derived from 15-crown-5 were found to display excellent Na+/K+ selectivity.
研究发现,某些由 15-冠醚-5衍生出的具有电导性侧矛的宿主分子具有极佳的 Na+/K+ 选择性。
The effect of sidearm heteroatoms and a quaternary methyl group at the pivot position in lariat ethers
作者:Yohji Nakatsuji、Tetsuya Nakamura、Mitsuo Okahara、Dennis M. Dishong、George W. Gokel
DOI:10.1016/s0040-4039(00)87102-6
日期:1982.1
A methyl group geminal to the “pivot” carbon in hydroxy-methyl-derived lariatethers dramatically enhances the binding afforded a complexed cation by the sidearm.
在羟甲基衍生的套索状醚中“枢轴”碳上成对的甲基大大增强了侧臂提供的络合阳离子的结合。
Active transport of sodium and potassium ions in opposite directions by a novel bis(crown ether)
Sodium and potassium cation were actively transported in opposite directions across a dichloromethane membrane by a novel bis(crownether), which has a structure consisting of 15-crown-5 and monoaza-18-crown-6 linked by two oxyethylene units.