Two pseudo-N3 ligands and the catalytic activity of their ruthenium(II) complexes in transfer hydrogenation and hydrogenation of ketones
作者:Z.K. Yu、F.L. Zeng、X.J. Sun、H.X. Deng、J.H. Dong、J.Z. Chen、H.M. Wang、C.X. Pei
DOI:10.1016/j.jorganchem.2007.01.058
日期:2007.5
cases. The difference between the catalytic activity of 5 and 1 is attributed to the significantly different arrangement and positions of the PPh3 and chlorides and also to the different electron density on the N-heterocycles. Complex 1 exhibited good to excellent catalytic activity in hydrogenation of ketones under mild conditions. These results have suggested new applications of iBu-BTP and Me4BPPy
通过2,6-双(5,6-双(异丁基)-1,2,4-三嗪-3-基的反应合成了RuCl 2(PPh 3)(i Bu-BTP)(5)吡啶(i Bu-BTP)和RuCl 2(PPh 3)3在回流的甲苯中,并通过X射线晶体学测定确定其分子结构。配合物5用作酮转移氢化的催化剂,并显示出与RuCl 2(PPh 3)(Me 4 BPPy)(1)(Me 4在某些情况下,BPPy =双(3,5-二甲基吡唑-1-基)吡啶。5和1的催化活性之间的差异归因于PPh 3和氯化物的排列和位置显着不同,也归因于N-杂环上的电子密度不同。在温和条件下,配合物1在酮的氢化反应中表现出良好至优异的催化活性。这些结果表明,i Bu-BTP和Me 4 BPPy作为有希望的平面三齿假-N 3配体的新应用可以构建高活性的过渡金属催化剂。