1: 2-(4-bromophenyl)acetic acid With sodium hexamethyldisilazane in tetrahydrofuran T=-70 - -60°C; 1.5 h; 2: 2,4-dichlorobenzoic acid methyl ester in tetrahydrofuran T=-70 - 5°C; 0.5 h;

1: 2-(4-bromophenyl)acetic acid With sodium hexamethyldisilazane in tetrahydrofuran T=-70 - -60°C; 1.5 h; 2: 2,4-dichlorobenzoic acid methyl ester in tetrahydrofuran T=5°C; 0.5 h; 3: With hydrogenchloride; water in tetrahydrofuran T=0°C;