1: With methyllithium in tetrahydrofuran; diethyl ether; pentane T=-78°C; 1 h; 2: With tert.-butyl lithium in tetrahydrofuran; diethyl ether; pentane T=-78°C; 1 h; 3: With boric acid trimethyl ester; water more than 3 stages;

1: N-(3-bromophenyl)-N-methylamine With methyllithium in tetrahydrofuran T=-70°C; 1 h; 2: With tert.-butyl lithium in tetrahydrofuran T=-70°C; 0.75 h; 3: boric acid trimethyl ester With hydrogenchloride; water more than 3 stages;