3,4-Difluoro substituted benzenes are prepared by reacting 3,4-dihalo substituted benzenes with an effective amount of KF or CsF, in a polar aprotic solvent, at an elevated temperature, under substantially anhydrous conditions. The product can be removed as it is formed or the reaction may be run at the autogenous pressures generated by the reaction mixture in a sealed reactor.
3,4-二
氟取代苯的制备方法是:在极性无
水溶剂中,将 3,4-二卤取代苯与有效量的 KF 或 CsF 反应,在升高的温度和基本无
水的条件下进行。产物可以在形成时去除,也可以在密封反应器中以反应混合物产生的自生压力进行反应。