potassium carbonate in acetonitrile T=50°C; 0.333333 h; microwave irradiation;

1: With caesium carbonate; L-proline in N,N-dimethyl-formamide 0.333333 h; Molecular sieveInert atmosphere; 2: With copper(l) iodide; caesium carbonate in N,N-dimethyl-formamide T=120°C; 40 h; Inert atmosphere;

1: 52 percent / Bu3SnH; Bu3P / (PPh3)2PdCl2 / tetrahydrofuran / 5 h / 20 °C 2: 99 percent / K2CO3 / acetonitrile / 0.33 h / 50 °C / microwave irradiation View Scheme