Aerobic Homocoupling of Arylboronic Acids Catalyzed by Regenerable Pd(II)@MIL‐88B‐NH
<sub>2</sub>
(Cr)
作者:Alejandro Valiente、Sergio Carrasco、Amparo Sanz‐Marco、Cheuk‐Wai Tai、Antonio Bermejo Gómez、Belén Martín‐Matute
DOI:10.1002/cctc.201900556
日期:2019.8.21
A fast and operationally simple method for the aerobic homocoupling of arylboronic acids is described. The process is catalyzed by Pd(II) complexes supported on the metal‐organic framework MIL‐88B‐NH2(Cr). The benefits of this approach include the use of a benign oxidant/solvent mixture at room temperature with catalytic amounts of base, easy recovery of the catalyst, and easy isolation of the products
描述了一种快速且操作简单的方法用于芳基硼酸的好氧均偶联。该过程由金属有机骨架MIL-88B-NH 2上支持的Pd(II)配合物催化(铬)。这种方法的好处包括在室温下使用具有催化量的碱的良性氧化剂/溶剂混合物,容易回收催化剂,并且容易分离产物。对于各种基材,都可以实现很高的转化率和良好的产率,并且该工艺还以相同的效率在更大的规模上进行。发现该催化剂由于钯的逐步还原和附聚成惰性金属簇/颗粒而失活。提出了一种创新的方法,用于活性Pd(II)@MOF物种的氧化再分散和再生。