Efficient and recyclable Ru(II) arene thioamide catalysts for transfer hydrogenation of ketones: Influence of substituent on catalytic outcome
作者:Appukutti Kanchanadevi、Rengan Ramesh、David Semeril
DOI:10.1016/j.jorganchem.2016.02.016
日期:2016.4
The ruthenium(II) complexes have been examined for the transfer hydrogenation of various aromatic, heterocycle and cyclic ketones. The formation of ruthenium(II) hydride is confirmed by 1H- NMR and is proposed as the catalytic intermediate in this reaction. Under the optimized conditions, these ruthenium complexes served as excellent catalyst precursors which smoothly reduce the ketones with conversion
六个阳离子钌(II)芳烃与分子通式的硫代酰胺络合物的[Ru(η 6 - p -cymene)(PPH 3)(L)] + [其中,L =吡啶-2-硫代酰胺和它的衍生物]已成功从的[Ru(反应合成η 6 - p氯-cymene)2 ] 2与螯合配体的硫代酰胺和PPH 3 2 M比分别为:在1在甲醇中。所有的复合物分离,为他们的BPH 4 -的盐,并通过分析和光谱(FT-IR,UV-Vis和被完全表征11 H-NMR)方法。复合物中的一个的固态结构,的[Ru(η 6 - p -cymene)(PPH 3)(L4)] BPH 4(4)(L4 = ñ - (2,4,6-三甲基苯基)吡啶已通过X射线单晶衍射建立了2-硫代羧酰胺),表明复合物中存在伪八面体(钢琴凳)配位几何。已经研究了钌(II)配合物对各种芳族,杂环和环状酮的转移氢化作用。氢化钌(II)的形成由1确认1 H-NMR被提出作为该反应中的