1: 50 percent / 4-(dimethylamino)pyridine / acetonitrile / 12 h / 24 °C 2: 65 percent / tributyltin hydride, azobisisobutyronitrile / toluene / 3 h / Heating View Scheme

4-(N,N-dimethlyamino)pyridine in acetonitrile T=24°C; 12 h;