Synthesis of a series of novel 2,2'-bipyridine-based ligands bearing the axially chiral 2,2'-dialkoxy-1,1'-binaphthalene units is presented. The oxydimethylene, amidomethylene and amido spacers have been utilised to link the 3 or 3,3' positions of the binaphthalene skeleton with the 6 or 6,6' positions of the 2,2'-bipyridine moieties. The ligands have been synthesised in both racemic and enantiomerically pureRforms.
本文介绍了一系列新型
2,2'-联吡啶配基的合成,这些配基带有轴手性的
2,2'-二烷
氧基-
1,1'-联萘基团。
氧二
甲基、
酰胺甲基和
酰胺间隔被用来连接联
萘骨架的3或3,3'位置和
2,2'-联吡啶基团的6或6,6'位置。这些配基既可以合成为外消旋体,也可以合成为对映纯的R形式。