A modification of polystyrene supported palladium(II) complex as effective catalyst for Mizoroki‐Heck reaction

Abstract

Chloromethylated polystyrene cross-linked with 5% divinylbenzene (PS5) has been successfully functionalized with phenyldithiocarbazate ligand (PS5-PDC). The polymer was used as solid support for anchoring the palladium metal (PS5-PDC-Pd). The properties of dark colored polymer, impregnated with palladium complex was then characterized by various spectroscopic and analytical techniques namely Fourier Transform Infrared (FTIR), elemental chemical analysis CHNS, Thermogravimetric analysis (TGA), BET surface area, powder X-ray Diffraction (XRD), Inductively Coupled Plasma-Optical Emission Spectrometer (ICP-OES) and Scanning Electron Microscopy/Energy Dispersive X-ray (SEM-EDX). Supported catalyst of PS5-PDC-Pd was then tested in the Mizoroki-Heck reaction of 4-bromoacetophenone with methyl acrylate. The reaction was monitored by GC-FID. Preliminary results showed that supported catalyst could be used in at least three consecutive Mizoroki-Heck reactions with the same catalytic activity.