1: 1H-imidazole; N,N-dimethyl-formamide With sodium hydride in N,N-dimethyl-formamide T=0°C; 0.25 h; 2: 4-Flouro-3-trifluoromethyl-1-nitrobenzene in N,N-dimethyl-formamide T=20°C; 2 h;