作者:Lolakshi Mahesh Kumar、Badekai Ramachandra Bhat
DOI:10.1016/j.jorganchem.2016.11.005
日期:2017.1
cobalt complexes with tridentate pincer ligands were synthesized to study their catalytic activity in Suzuki-Miyaura coupling reactions. Cobalt complexes, C-1, C-2, C-3 bearing asymmetrical PNCOP pincer ligand [C6H4-1-(NHPPh2)-3-(OPPh2)] (L-1) and symmetrical PNCNP, PNNNP pincer ligands [C6H4-2,6-(NHPPh2)2] (L-2) and [C5H3N-2,6-(NHPPh2)2] (L-3) were synthesized by the reaction of diphenylchlorophosphine
合成了一系列具有三齿钳形配体的钴配合物,以研究其在Suzuki-Miyaura偶联反应中的催化活性。带有不对称PNCOP钳形配体[C 6 H 4 -1-(NHPPh 2)-3-(OPPh 2)](L-1)和对称PNCNP,PNNNP钳形的钴配合物C-1,C-2,C-3配体[C 6 H 4 -2,6-(NHPPh 2)2 ](L-2)和[C 5 H 3 N-2,6-(NHPPh 2)2 ](L-3)是通过在三乙胺作为碱和四氢呋喃作为溶剂介质存在下,二苯氯膦分别与间氨基苯酚,间苯二胺和2,6-二氨基吡啶以1:2的比例反应合成的。在苯基硼酸和对位取代的溴苯之间的交叉偶联中,检查了合成的络合物的CC偶联效率。基于偶联产率,研究了配体变化对钴夹钳复合物催化活性的影响。观察到随着配体侧臂中“ N”原子数目的增加,配体的给体能力增加,这导致配合物的催化活性增加。