Syntheses and Metal Ion Complexation of Novel 8-Hydroxyquinoline-Containing Diaza-18-Crown-6 Ligands and Analogues
作者:Ning Su、Jerald S. Bradshaw、Xian Xin Zhang、Huacan Song、Paul B. Savage、Guoping Xue、Krzysztof E. Krakowiak、Reed M. Izatt
DOI:10.1021/jo991081o
日期:1999.11.1
degrees C in MeOH. Bis(8-hydroxyquinoline-2-ylmethyl)-substituted ligand 13 forms a very strong complex with Ba(2+) (log K = 11.6 in MeOH) and is highly selective for Ba(2+) over Na(+), K(+), Zn(2+), and Cu(2+) (selectivity factor > 10(6)). The (1)H NMR spectral studies of the Ba(2+) complexes with bis(8-hydroxyquinoline-2-ylmethyl)- and bis(5,7-dichloro-8-hydroxyquinoline-2-ylmethyl)-substituted diaza-18-crown-6
通过单锅或逐步曼尼希反应,还原胺化或使diaza-18-crown-6与5,7-dichloro-2反应,合成了十种新的含8-羟基喹啉的diaza-18-crown-6配体和类似物。 N,N-二异丙基乙胺存在下的-碘甲基-8-喹啉醇。N,N'-双(甲氧基甲基)二氮杂18-crown-6与4-氯-2-(1H-吡唑-3-基)苯酚的曼尼希反应得到NCH(2)N-连接的双(3- (5-氯-2-羟基)吡唑-1-基甲基)-取代的二氮杂皇冠醚(14),收率为98%。双(N,N′-甲氧基甲基二氮杂)-18-crown-6与2.2当量的10-羟基苯并喹啉的反应仅得到单取代的二氮杂皇冠醚配体(8)。通过量热滴定技术在25°C的MeOH中评估某些配体与各种金属离子的相互作用。双(8-羟基喹啉-2-基甲基)取代的配体13与Ba(2+)形成非常强的络合物(在MeOH中对数K = 11.6),并且对Na(+),K上的