Abstract
Various Pd–pyridyl complexes tethered on polystyrene were investigated as novel immobilized Pd catalysts for the direct synthesis of diphenyl carbonate (DPC) by oxidative carbonylation using phenol, carbon monoxide, and air. These Pd catalysts showed reasonably high efficiencies in the absence of ammonium halide. The best efficiencies were obtained by using Pd–biquinoline complex tethered on polystyrene 1, Pd–bipyridyl complex tethered on polystyrene 3, and Pd–methylpyridyl complex tethered on polystyrene 7 where TOF reached about 4 (mol-DPC/mol-Pd h), respectively. Their efficiencies were higher than those of the Pd complex catalyst tethered on conventional polymer support and PdBr 2 under similar conditions.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
