Synthesis and extraction properties of new ‘proton-switchable’ tri- and tetra-substituted calix[4]arene derivatives bearing pyridinium units
作者:Mustafa Tabakci、Shahabuddin Memon、Mustafa Yilmaz
DOI:10.1016/j.tet.2007.04.060
日期:2007.7
properties of new calixarene-based extractants, which have been synthesized from 5,11,17,23-tetra-tert-butyl-25,26,27-tris(chlorocarbonylmethoxy)-28-hydroxycalix[4]arene and 5,11,17,23-tetra-tert-butyl-25,26,27,28-tetrakis(chlorocarbonylmethoxy)calix[4]arene by treatment with isoniazid (isonicotinic acid hydrazide) in the presence of pyridine, respectively. p-tert-Butylcalix[4]arene teraamide was converted
本文介绍了由5,11,17,23-四叔丁基-25,26,27-三(氯羰基甲氧基)-28-羟基杯[4]合成的新型杯芳烃类萃取剂的合成和络合特性。芳烃和5,11,17,23-四叔丁基-25,26,27,28-四(氯羰基甲氧基)杯[4]芳烃,分别在吡啶存在下用异烟肼(异烟酸酰肼)处理。p -叔-Butylcalix [4]芳烃teraamide通过用甲基碘在乙腈回流转化成它的甲基碘化物盐。在该合成中它被认为探索HCR的提取吡啶位点的角色2 ö 7 - / Cr的2 ö7 2−阴离子。朝向选择的碱金属/过渡金属阳离子和萃取剂的络合性能HCR 2 ö 7 - / Cr的2个ö 7 2-报告阴离子。已经观察到,两种受体均不提取碱金属阳离子,但是显示出对过渡金属的极好的选择性。该受体的质子化吡啶鎓形式是有效的HCR转印2 ö 7 - / Cr的2 ö 7 2-从含水阴离子成二氯甲烷层。