pyridine; 4-(N,N-dimethlyamino)pyridine; copper; N,N-dimethyl-formamide 1.) < -70 to 115 deg C; sealed tube, 2.) 8 h, 60 deg C; sealed tube was opened; Yield given. Multistep reaction;

With  hydrogenchloride in  dichloromethane 1.5 h;  Ambient temperature;