The syntheses of two families of ditopic N-heterocyclic ligands are described. All the compounds contain a central pyrazine ring connected to peripheral pyridine or bipyridine moieties, providing bipyridine- and terpyridine-like binding sites, respectively. Annellated terpene fragments render these metal chelators chiral. Thus they face the challenge of introducing stereoselectivity into the formation of chiral, multinuclear co-ordination species.
本文介绍了两个二位 N-杂环
配体家族的合成过程。所有化合物都含有一个与外围
吡啶或联
吡啶分子相连的中央
吡嗪环,分别提供了类似联
吡啶和萜
吡啶的结合位点。缀合的萜烯片段使这些
金属
螯合剂具有手性。因此,它们面临着将立体选择性引入手性多核配位物形成的挑战。