4-(N,N-dimethlyamino)pyridine in dichloromethane T=20°C; 12 h; Inert atmosphere;

1: With copper diacetate; potassium ethylxanthate in N,N-dimethyl-formamide T=80°C; 15 h; Inert atmosphere; 2: With hydrogenchloride in N,N-dimethyl-formamide T=20°C; 8 h;

1-(N-ferrocenylmethyl)benzimidazole grafted onto Merrifield resin in dimethyl sulfoxide T=140°C; 16 h;