1: oxalyl chloride; DMF / benzene / 1 h / 20 °C 2: 278 mg / benzyl(chloro)-bis(triphenylphosphine)palladium(II) / hexamethylphosphoric acid triamide / 0.75 h / 65 °C View Scheme

PhCH2Pd(PPh3)2Cl in N,N,N',N',N'',N''-hexamethylphosphoric triamide T=60°C; 0.75 h;

Grubb's 2nd generation catalyst in dichloromethane T=50°C; 12 h;