Synthesis and Characterization of Diametrically Substituted Tetra-<i>O</i>-<i>n</i>-butylcalix[4]arene Ligands and Their Chelated Complexes of Titanium, Molybdenum, and Palladium
作者:Daniel R. Evans、Mingsheng Huang、James C. Fettinger、Tracie L. Williams
DOI:10.1021/ic020446b
日期:2002.11.1
Calix[4]arene derivatives include, tetra-n-butoxycalix[4]arene (nBu4Clx, 3), 5,11,17,23-tetrabromo-tetra-n-butoxycalix[4]arene (Br4-nBu4Clx, 4), 5,17-dibromo-tetra-n-butoxycalix[4]arene (Br2-nBu4Clx, 5), 5,17-bis(formyl)-tetra-n-butoxycalix[4]arene ((CHO)2-nBu4Clx, 6), and 5,17-bis(chloromethyl)-tetra-n-butoxycalix[4]arene ((ClCH2)2-nBu4Clx, 9), all of which were synthesized using modifications of existing
三种新的上边缘取代的杯[4]芳烃配体5,17-双(羟甲基)-四正丁氧基杯[4]芳烃((HOCH2)2-nBu4Clx,7),5,17的连接特性-双((二苯基膦基)甲氧基)-四正丁氧基杯[4]芳烃((PPh2OCH2)2-nBu4Clx,8)和5,17-双((二苯基膦基甲基)甲基)-四正丁氧基杯[4]本文报道了芳烃((PPh2CH2)2-nBu4Clx,10)。新制备的化合物与先前报道的直径取代的杯[4]芳烃衍生物不同,在于下缘取代基为正丁基。由于所有材料的纯化都是通过简单的结晶进行的,因此这种低边缘取代基的存在不会降低这些配合物的固有结晶度。合成8和10的关键前驱物是7,从四叔丁基杯[4]芳烃1开始,它的获取分六个步骤进行。杯[4]芳烃衍生物包括,四正丁氧基杯[4]芳烃(nBu4Clx,3),5,11,17,23-四溴-四正丁氧基杯[4]芳烃(Br4-nBu4Clx,4), 5,17-二溴