Continuous-flow Heck coupling reactions catalyzed by Pd complexes of amidoxime fibers

Improving production efficiency and developing green catalytic systems are key issues for applying Heck coupling reactions in the chemical industry. In this study, an amidoxime-fiber-supported Pd catalyst is prepared from polyacrylonitrile fiber, hydroxylamine hydrochloride, PdCl 2 . The morphology structure of characterized by scanning electron microscopy, energy-dispersive spectroscopy, X-ray photoelectron spectrometer, diffraction, inductively coupled plasma-optical emission spectrometer. A packed-bed flow reactor designed employed catalysis reaction iodobenzene styrene based on catalyst. effects temperature, rate, cycle time, reactant concentration conversion yield investigated. results show that optimal conditions continuous-flow single 70 °C, 30 mmol L −1 a solution N,N-dimethylformamide (100 mL) under continuous at rate mL min showed good activity stability after operation time 50 h, with 2.21 times higher than obtained traditional batch reaction. Furthermore, we have established new system numbering-up reactors parallel connection. four reactor. Kinetic studies reveal has low activation energy (8.8771 kJ mol ), indicating activity. This research provides alternative pathway highly efficient flow.