1: 2-bromophenyl isothiocyanate With n-butyllithium in tetrahydrofuran; hexane T=-78°C; 0.0833333 h; 2: With selenium in tetrahydrofuran; hexane T=-78°C; 0.5 h; 3: ethyl iodide in tetrahydrofuran; hexane T=-78 - 20°C; 0.5 h;