1: With lithium diisopropyl amide in tetrahydrofuran T=-70 - 20°C; Inert atmosphere; 2: With hydrogenchloride; water in tetrahydrofuran pH=7; Cooling with ice;

n-butyllithium; diisopropylamine in tetrahydrofuran

1: With water in ethanol Inert atmosphere; 2: With bromine in ethanol; water T=0°C; 2 h; Inert atmosphere;