1: 87 percent / n-Bu3P, HCO2NH4 / Pd2(dibenzylideneacetone)3*CHCl3 / tetrahydrofuran / 5 h / 20 - 30 °C 2: 90 percent Chromat. / n-Bu3P, HCO2NH4 / Pd2(dibenzylideneacetone)3*CHCl3 / dimethylformamide / 4 h / 80 °C View Scheme

tributylphosphine; ammonium formate; tris(dibenzylideneacetone)dipalladium(0) chloroform complex in N,N-dimethyl-formamide T=70°C; 1.5 h;