1: potassium carbonate / N,N-dimethyl-formamide / 10 h / 80 °C / |Inert atmosphere; |Sealed tube 2: 1,10-phenanthroline; potassium tert-butylate / 1,3,5-trimethyl-benzene / 24 h / 100 - 110 °C / |Inert atmosphere; |Schlenk technique; |Sealed tube View Scheme

1: 293 mg / Et3N / CH2Cl2 / 0.5 h / 20 °C 2: 81 percent / Bu3P; 1,3-bis-(diphenylphosphino)propane; iPr2NEt / Pd(OAc)2 / dimethylformamide / 0.5 h / Heating View Scheme

1: potassium carbonate / N,N-dimethyl-formamide / 10 h / 80 °C / |Inert atmosphere; |Sealed tube 2: 1,10-phenanthroline; potassium tert-butylate / 1,3,5-trimethyl-benzene / 24 h / 100 - 110 °C / |Inert atmosphere; |Schlenk technique; |Sealed tube View Scheme

1: 578 mg / Et3N / CHCl3 / 12 h / 20 °C 2: 93 percent / Bu3P; 1,3-bis-(diphenylphosphino)propane; iPr2Net / Pd(OAc)2 / dimethylformamide / 0.5 h / Heating View Scheme