Synthesis of Pd(II) and Pt(II) complexes possessing bicyclo[3.2.0]heptanyl phosphinite ligands: Identification of a novel Pd(II) precatalyst for 1,6-diene cycloisomerisation
作者:Ian J.S. Fairlamb、Stephanie Grant、Adrian C. Whitwood、John Whitthall、Andrei S. Batsanov、Jonathan C. Collings
DOI:10.1016/j.jorganchem.2005.01.037
日期:2005.10
bis(acetonitrile)palladium(II)chloride to give the novel air and moisture stable palladium(II) complex 11. A platinum(II) relative 12 has also been synthesised by reaction of phosphinite 1 with bis(benzonitrile)platinum(II)chloride. Each complex has been thoroughly characterised and their molecular structures confirmed by X-ray diffraction studies. In catalytic applications, such as cross-coupling reactions of organometallic
据报道,具有不寻常的双环[3.2.0]庚烷骨架的单齿和双齿次膦酸酯配体的合成。描述了一种关键中间体,即3-内-6-内-二羟基双环[3.2.0]庚烷的方便,无锡的合成。空气敏感的次膦酸酯配体1被保护为稳定的硼烷加合物,或直接与双(乙腈)氯化钯(II)反应,生成了新型的对空气和湿气稳定的钯(II)络合物11。还通过次膦酸酯1的反应合成了相对铂(II)的12含双(苄腈)氯化铂(II)。每个复合物已被彻底表征,其分子结构已通过X射线衍射研究得以证实。在催化应用中,例如有机金属试剂与有机卤化物的交叉偶联反应,已经为11建立了出乎意料的差的活性。例如,在催化量为11的情况下,活化和失活的芳基溴化物与芳基硼酸的Suzuki-Miyaura交叉偶联,以低产量进行,伴有大量的同质耦合。在水和非水条件下,钯的团聚在这些反应中都是快速产生无催化活性的钯黑的。提出不良的反应性是由于不利的近四面体'(PP')Pd(