1: 2-[2-(1-ethyl-1H-imidazol-4-yl)-ethyl]-isoindole-1,3-dione; 2-[2-(3-ethyl-3H-imidazol-4-yl)-ethyl]-isoindole-1,3-dione With hydrazine in ethanol T=95°C; 1.5 h; 2: ethyl bromide in DMF (N,N-dimethyl-formamide) T=0 - 20°C; 24.5 h;