1: tert-butylamine With n-butyllithium in tetrahydrofuran; hexane T=0 - 20°C; 1.5 h; Inert atmosphere; 2: 2-Fluoro-benzoic Acid in tetrahydrofuran; hexane T=0°C; 72 h; 3: With hydrogenchloride in water pH=5;

1: tert-butylamine With n-butyllithium in hexane T=0 - 20°C; 1 h; Inert atmosphere; 2: 2-Fluoro-benzoic Acid in tetrahydrofuran; hexane T=-50°C; 14 h; Inert atmosphere; 3: With hydrogenchloride; water in tetrahydrofuran; hexane T=0°C; pH=1; Inert atmosphere;

sodium hydroxide in benzene