1: 2-Methoxy-4-trifluoromethoxy bromobenzene With n-butyllithium in tetrahydrofuran; hexane T=-77 - -62°C; 0.166667 h; 2: boric acid trimethyl ester in tetrahydrofuran; hexane T=-76.3 - -63.2°C; 1.16667 h; 3: With hydrogenchloride in tetrahydrofuran; hexane; water pH=1;