Water-soluble dendritic iridium catalysts were synthesized by attaching a reactive metal complex to DAB-Am dendrimers via an adapted asymmetric bipyridine ligand. These dendritic catalysts were applied in the aqueous reductive amination of valine while contained in a dialysis bag. Comparable conversions were observed as for the noncompartmentalized counterparts, albeit with somewhat longer reaction times. These results clearly show that the encapsulated catalyst system is suitable to successfully drive a complex reaction mixture with various equilibrium reactions to completion.
通过将反应性金属配合物连接到经过改进的不对称双吡啶配体上的DAB-Am树状分子,合成了水溶性树状铱催化剂。这些树状催化剂被应用于在透析袋中进行缬氨酸的水相还原胺化反应。与非分隔对照相比,观察到了类似的转化率,尽管反应时间略长。这些结果清楚地表明,封装的催化系统适合成功地推动具有各种平衡反应的复杂反应混合物至完成。