1: 4-bromo-2,2-difluoro-1,3-benzodioxole With n-butyllithium in tetrahydrofuran; hexane T=-78°C; 0.5 h; 2: boric acid trimethyl ester in tetrahydrofuran; hexane T=-78 - 20°C; 2 h; 3: With hydrogenchloride; water in tetrahydrofuran; hexane T=0 - 20°C; 0.333333 h;

1: 2,2-difluoro-1,3-benzodioxole With sec.-butyllithium in tetrahydrofuran; cyclohexane T=-78°C; 1.5 h; 2: boric acid trimethyl ester in tetrahydrofuran; cyclohexane T=-78 - -30°C; 3: With hydrogenchloride; water in tetrahydrofuran; cyclohexane

1: With sec.-butyllithium in tetrahydrofuran; cyclohexane T=-78°C; 1.5 h; 2: With boric acid trimethyl ester in tetrahydrofuran; cyclohexane T=-78 - -30°C; 3: With hydrogenchloride; water in tetrahydrofuran; cyclohexane

hydrogenchloride; n-butyllithium; sodium chloride in tetrahydrofuran; Petroleum ether