Palladium(II) Pincer Type Complexes Containing ONO Donor Heterocyclic Hydrazones: Synthesis, Structure and Catalytic Activity Towards the Suzuki–Miyaura Cross-Coupling of 3-Bromochromone and Arylboronic Acids via C–Br Activation
作者:C. Shalini、N. Dharmaraj、Nattamai S. P. Bhuvanesh、M. V. Kaveri
DOI:10.1007/s10562-023-04276-4
日期:——
pincer type palladium(II) complexes 1–3 synthesized by reacting palladium precursor [PdCl2(PPh3)2] with ONO heterocyclic hydrazone ligands H2L1-3 in equimolar quantities were well characterized using single-crystal XRD, analytical and spectroscopic data. These complexes were examined as homogeneous catalysts for the Suzuki–Miyaura cross-coupling of 3-bromochromone with a range of arylboronic acids in ethanol
钯前体[PdCl 2 (PPh 3 ) 2 ]与ONO杂环腙配体H 2反应合成三种新型钳形钯(II)配合物1-3使用单晶 XRD、分析和光谱数据很好地表征了等摩尔量的 L1-3。这些配合物被检测为均相催化剂,用于 3-溴色酮与一系列芳基硼酸在乙醇介质中的 Suzuki-Miyaura 交叉偶联。催化转化在有氧条件下顺利进行,室温下催化剂负载量为 0.01 mol%,得到一系列 3-芳基化色酮 (6a–o)。该催化剂最多可重复使用五个循环,有利的是该方案不需要任何外部氧化剂、添加剂和相转移试剂。 图形概要