Coordination Chemistry of Lipoic Acid and Related Compounds V [1]. New Heteroditopic Ligands Derived from Monoazacrown Ethers and Lipoic Acid
作者:Michaela Wilhelm、Eva Berssen、Rainer Koch、Henry Strasdeit
DOI:10.1007/s007060200080
日期:2002.8.1
4,7,10,13-pentaoxa-16-azacyclooctadecane) to afford new N -lipoylated azacrown compounds in good yields. These compounds can be transformed into 1,3-dithiols and amines by reduction with complex hydrides of the disulfide and/or amide group of the lipoyl chain. The new pendant-arm macrocycles react as heteroditopic ligands by forming dithiolate and disulfide complexes with the ‘soft’ metal ions Ni2+
脂酰咪唑啉与aza-15-crown-5(1,4,7,10-tetraoxa-13-azacyclopentadecane)或aza-18-crown-6(1,4,7,10,13-pentaoxa-16-azacyclooctadecane反应)以高收率提供新的 N- 脂酰化的氮杂皇冠化合物。通过用脂酰链的二硫键和/或酰胺基的复合氢化物还原,可以将这些化合物转化为1,3-二硫醇和胺。新的悬臂大环化合物通过分别与“软”金属离子Ni 2+和Pd 2+以及与“硬” Li +的胺配合物形成二硫醇盐和二硫键络合物,作为异位配体反应。离子。对锂离子络合的半经验和DFT计算得出最有利的结构,其中氮杂皇冠和两个溶剂分子与金属而不是侧链接触。