Example: 洛索洛芬钠( Sodium Loxoprofen) 中间体的合成 2-(4-(bromomethyl)phenyl)propanoic acid COOH Br, or nbs etc Br COOH COOH Cl or so,Cl etc 2-(4-chloromethyl)phenyl)propanoic acid O NExample: 洛索洛芬钠(Sodium Loxoprofen) 中间体的合成 COOH COOH COOH Br Cl Br 2 or NBS, etc. Cl 2 or SO2 Cl 2 , etc. 2-(4-(bromomethyl)phenyl)propanoic acid 2-(4-(chloromethyl)phenyl)propanoic acid