New lipophilic crown ethers with intraannular carboxylic acid groups: Synthesis and alkali metal cation extraction
作者:Larry D. Bratton、Hwang Huh、Richard A. Bartsch
DOI:10.1002/jhet.5570370424
日期:2000.7
sizes of 15-crown-4, 18-crown-5, 21-crown-6 and 24-crown-7 is described. Eight new polyether compounds that bear inward-facing bromo and formate ester substituents are prepared as synthetic intermediates. Selectivities and efficiencies of the four new lipophilic crown ether carboxylic acids in competitive alkali metal cation extraction from aqueous solutions into chloroform are evaluated.
描述了通过六步合成路线合成四种具有环内羧酸基团且环大小为15冠4、18冠5、21冠6和24冠7的亲脂冠醚。制备具有向内的溴和甲酸酯取代基的八种新的聚醚化合物作为合成中间体。评估了四种新的亲脂性冠醚羧酸在竞争性碱金属阳离子从水溶液中萃取到氯仿中的选择性和效率。