1: 86 percent / AIBN / <P(C6H5)3>4Pd / dimethylformamide / 20 h / 120 °C 2: 60 percent / Et3N, DMAP / dimethylformamide; CH2Cl2 / 20 h / Ambient temperature 3: 89 percent / dimethylformamide / 24 h / Ambient temperature 4: 57 percent / n-Bu3SnH, AIBN / toluene / 4 h / 110 °C 5: 63 percent / dimethylformamide / 4 h / 90 °C 6: 70 percent / n-Bu3SnH, AIBN / toluene / 2 h / Heating 7: 70 percent / Et4NF / acetonitrile / 2 h / Ambient temperature View Scheme

bis-triphenylphosphine-palladium(II) chloride; copper(l) iodide; triethylamine in N,N-dimethyl-formamide T=80°C; 1 h;

1: 84 percent / pyridine / 1.) 0 deg C, 1 h, 2.) 25 deg C, 2 h 2: 51 percent / n-pentyl nitrite, diiodomethane / 7 h / 80 °C View Scheme