1: 1,3-Dibromo-2-(3-bromo-propoxy)-benzene With n-butyllithium in tetrahydrofuran; hexane; toluene T=-78 - 5°C; 4.5 h; 2: N,N-dimethyl-formamide in tetrahydrofuran; hexane; toluene T=5 - 20°C; 0.666667 h; 3: With hydrogenchloride; water in tetrahydrofuran; hexane; toluene T=20°C;

n-butyllithium in tetrahydrofuran; hexane T=-80°C;