Arylation of phosphoryl-stabilized carbanions with metal π-complexes of aryl chlorides and fluorides

The nucleophilic aromatic substitution of halogen in metal arene π-complexes η6-(ArF)Cr(CO)3 and [η6-(ArHal)FeCp]+[PF6]− (Hal=F,Cl) with phosphoryl-stabilized carbanions ZCH2P(O)(OEt)2 (Z=COOEt, CN) allows the synthesis of metal π-complexes of α-EWG-substituted arylmethylphosphonates in high yields.