copper(l) iodide; potassium iodide in DMF (N,N-dimethyl-formamide) T=130°C; 3 - 6 h; Microwave irradiation;

1: sulfurated sodium borohydride / tetrahydrofuran / 16 h / Ambient temperature 2: 1.) NaNO2, 20percent H2SO4, 2.) KI / 1.) H2O, 12 min, 0 deg C, 2.) H2O, flask in aluminium foil, stirring 30 min View Scheme

1: 1.) NaNO2, 20percent H2SO4, 2.) KI / 1.) H2O, 12 min, 0 deg C, 2.) H2O, flask in aluminium foil, stirring 30 min View Scheme

Yield given. Multistep reaction;