Amphiphilic Dendrimers with Heteroleptic Bis([2,2?: 6?,2?]terpyridine)-Ruthenium(II) Cores
作者:Derk Joester、Volker Gramlich、Fran�ois Diederich
DOI:10.1002/hlca.200490262
日期:2004.11
A new series of dendrimers was assembled through formation of homo- and heteroleptic RuII complexes with [2,2′: 6′,2″]terpyridine ligands bearing hydrophilic and hydrophobic dendrons, with the aim to develop amphiphilic vectors for potential use in gene delivery (Scheme 1). The synthesis started with the preparation of the 4′-(3,5-dihalo-4-methoxyphenyl)-[2,2′: 6′,2″]terpyridine ligands 1a,bvia the
通过形成具有[2,2':6',2''] terpyridine配体的均一和杂配的Ru II复合物来组装新的树枝状聚合物,该配体带有亲水性和疏水性树突,目的是开发两亲载体以在基因中潜在使用交付(方案1)。开始与4的制备的合成' - (3,5-二卤代-4-甲氧基苯基) - [2,2':6',2“]三联吡啶配体1a中,b经由所述Kröhnke吡啶合成(方案2),然后通过Sonogashira交叉偶联将树突10a – 10f连接起来(图2),从而得到树突配体11– 16(方案3和4)。随后将配体引入Ru III的配位域中,得到稳定的中间体[Ru(11)Cl 3 ](24 ;方案7)和[Ru(14)Cl 3 ](27 ;方案8)。这些在还原条件下转化为杂配体[Ru(11)(13)](PF 6)2(25)和[Ru(13)(14)](PF 6)2(29)。然后除去25和29中的(叔丁氧基)羰基(Boc)