Oxidative carbonylation of phenol to diphenyl carbonate catalyzed by Pd dinuclear complex

Abstract

Pd dinuclear complexes were investigated as catalysts for direct synthesis of diphenyl carbonate (DPC) by oxidative carbonylation of phenol using carbon monoxide and air. Pd dinuclear complexes such as Pd 2(dpm) 2X 2 [dpm: bis(diphenylphosphino)methane, X: Cl, Br, I, OCN, SCN, N 2O, N 3] were found to be novel catalysts for the oxidative carbonylation of phenol. Pd 2(dpm) 2(OCN) 2/Mn(TMHD) 3/(Ph 3P) 2NBr system was more effective than conventional Pd mononuclear catalyst.