Quinine-Derived Imidazolidin-2-imine Ligands: Synthesis, Coordination Chemistry, and Application in Catalytic Transfer Hydrogenation
作者:Sabina-Alexandra Filimon、Cristian G. Hrib、Sören Randoll、Ion Neda、Peter G. Jones、Matthias Tamm
DOI:10.1002/zaac.200900485
日期:2010.4
Two new optically active bidentate N,N-ligands, DMIQCI (3a) and DMIQCD (3b), containing a quinuclidine core and an imidazolidin-2-imine unit, were synthesized. The reaction of these ligands with [(η5-C5Me5)RuCl]4 afforded the brick-red ruthenium(II) complexes [(η5-C5Me5)Ru(DMIQCI)Cl] (4) and [(η5-C5Me5)Ru(DMIQCD)Cl] (5), which were used as catalysts in the transfer hydrogenation of acetophenone in
合成了两个新的光学活性双齿 N,N-配体,DMIQCI (3a) 和 DMIQCD (3b),包含奎宁环核心和咪唑啉-2-亚胺单元。这些配体与 [(η5-C5Me5)RuCl]4 反应得到砖红色钌 (II) 配合物 [(η5-C5Me5)Ru(DMIQCI)Cl] (4) 和 [(η5-C5Me5)Ru(DMIQCD) )Cl] (5),用作苯乙酮在沸腾的 2-丙醇中转移氢化的催化剂。3a 和 3b 与 [(COD)PdCl2](COD = 1,5-环辛二烯)和 [(DME)NiBr2](DME = 1,2-二甲氧基乙烷)反应得到方形平面钯(II)配合物 [(DMIQCI)PdCl2] (7) 和 [(DMIQCD)PdCl2] (8) 或四面体镍 (II) 配合物 [(DMIQCI)NiBr2] (9) 和 [(DMIQCD)NiBr2] (10),分别。报道了 4、7、9·THF 和 10