Synthesis, structure, and characterization of picolyl‐ and benzyl‐linked biphenyl palladium N‐heterocyclic carbene complexes and their catalytic activity in acylative cross‐coupling reactions
作者:Nalluchamy Muniyappan、Shahulhameed Sabiah
DOI:10.1002/aoc.5421
日期:2020.4
N‐heterocyclic carbene ligands with picolyl (L1H2Br2, L3H2Br2) and benzyl (L2H2Br2, L4H2Br2) linked biphenyl backbone were synthesized and characterized. Their palladium(II) complexes [PdL1]Br2 (1), [PdL2Br2] (2), [PdL3]Br2 (3), and [PdL4Br2] (4) were synthesized by direct method using Pd(OAc)2. All complexes (1–4) were characterized by CHN analysis, electrospray ionization‐MS, nuclear magnetic resonance
合成并表征了具有吡啶基(L 1 H 2 Br 2,L 3 H 2 Br 2)和苄基(L 2 H 2 Br 2,L 4 H 2 Br 2)连接的联苯基骨架的N杂环卡宾配体。他们的钯(II)配合物[PdL 1 ] Br 2(1),[PdL 2 Br 2 ](2),[PdL 3 ] Br 2(3)和[PdL 4 Br 2 ](4)通过直接方法使用Pd(OAc)2合成。所有复合物(1 - 4)通过CHN分析,电喷雾电离质谱,核磁共振,和单晶X射线衍射进行了表征。分子结构证实了Pd(II)中心周围扭曲的方形平面几何形状。它们均在苯基硼酸与苯甲酰氯的酰基Suzuki交叉偶联中显示出良好的催化活性,从而以良好的收率得到二苯甲酮。