An improved procedure for the synthesis of aryl phosphonates by palladium-catalysed cross-coupling of aryl halides and diethyl phosphite in polyethylene glycol

Abstract

A general and greener protocol for the synthesis of aryl phosphonates by the cross-coupling of aryl halides and diethyl phosphite using tetrakis(triphenylphosphine)palladiume/triethylamine/polyethylene glycol 600 [Pd(PPh3)4/ Et3N/PEG 600] as an efficient catalytic system has been developed. This procedure also avoids hazardous solvents and is therefore an eco-friendly alternative to the existing methods.