New Tetraazacrown Ethers Containing Two Pyridine, Quinoline, 8-Hydroxyquinoline, or 8-Aminoquinoline Sidearms
作者:Zhaoxia Yang、Jerald S. Bradshaw、Xian X. Zhang、Paul B. Savage、Krzysztof E. Krakowiak、N. Kent Dalley、Ning Su、R. Todd Bronson、Reed M. Izatt
DOI:10.1021/jo982292g
日期:1999.4.1
tetraazacrown ethers containing two pyridine, quinoline, 8-hydroxyquinoline, or 8-aminoquinoline sidearms has been prepared. Crab-like cyclization of bis(alpha-chloroacetamide)s and diamines followed by reduction of the cyclic diamides was used to synthesize the selected crown ethers containing two unsubstituted macroring nitrogen atoms. The preparation of the macrocycles with sidearms was accomplished
制备了一系列含有两个吡啶,喹啉,8-羟基喹啉或8-氨基喹啉侧链的大环四氮杂row醚。双(α-氯乙酰胺)和二胺的蟹状环化,然后还原环二酰胺,用于合成所选的含有两个未取代的大环氮原子的冠醚。带有侧臂的大环的制备是通过使用三乙酰氧基硼氢化钠(NaBH(OAc)(3))作为还原剂,用冠醚对适当的醛进行还原胺化来完成的。含8-羟基喹啉和8-氨基喹啉的大环是通过对8-乙酰氧基喹啉-2-羧醛或8-硝基喹啉-2-羧醛进行还原胺化,然后分别除去乙酸酯基或将硝基还原为氨基而合成的。在水溶液(0.10 M)中通过电位计评估了配体22与Cu(2 +),Co(2 +),Ni(2 +),Zn(2 +),Cd(2+)和Pb(2+)的配合物Me(4)NCl)在25摄氏度下进行。配体22与这些金属离子形成了非常稳定的络合物。在乙酸缓冲水溶液(pH 5)中检查了22及其配合物的UV-vis光谱。22-Cu(2+)复合物在258