The synthesis of the title 2â²-deoxyadenosine derivatives bearing bipyridine, phenanthroline or terpyridine ligands and their corresponding RuII-complexes in position 8 linked viaacetylene or phenylene tethers was accomplished through cross-coupling reactions. The SuzukiâMiyaura reactions of boronic acids or the Sonogashira reactions of terminal acetylene derivatives of oligopyridine ligands were performed either on protected 8-bromoadenosines in organic solvents or, more efficiently, directly on unprotected nucleosides in aqueous acetonitrile or DMF. Direct cross-coupling reactions of unprotected nucleosides with RuII-complexes or the oligopyridine-boronic acids or -acetylenes gave the Ru-labelled nucleosides in one step in fair to good yields. This method was also proven to be applicable for direct Ru-labelling of dATP. Terpyridine-containing 2â²-deoxyadenosine exerted significant antiviral and cytostatic effects.
通过交叉偶联反应,合成了带有联
吡啶、
菲啰啉或特
吡啶配体的 2â²-脱氧
腺苷衍
生物,以及在第 8 位通过
乙炔或亚苯基拴连接的相应 RuII-络合物。
硼酸的铃木宫
脲反应或低聚
吡啶配体的末端
乙炔衍
生物的索诺伽希拉反应是在有机溶剂中对受保护的 8-
溴腺苷进行的,或者更有效的是在
乙腈水溶液或
DMF 中直接对未受保护的核苷进行的。将未受保护的核苷与 RuII-络合物或低聚
吡啶硼酸或-
乙炔直接进行交叉偶联反应,只需一步就能得到 Ru 标记的核苷,而且收率相当高。事实证明,这种方法也适用于直接对 d
ATP 进行 Ru 标记。含
吡啶的 2â²-脱氧
腺苷具有显著的抗病毒和细胞抑制作用。