The invention describes a process for selectively preparing ortho-fluorinated substituted aromatic compounds wherein an aromatic compound containing a substituent capable of directing ortho metalation is contacted with a metalating reagent under reaction conditions sufficient to form an ortho-metalated substituted aromatic compound. The ortho-metalated substituted aromatic compound is reacted with an electrophilic fluorinating reagent under reaction conditions sufficient to form the desired ortho-fluorinated substituted aromatic compound which is then recovered from the reaction mixture. The process which utilizes a metalation intermediate prior to effecting the electrophilic fluorination step overcomes problems associated with prior art electrophilic fluorination processes which do not proceed through a regiospecifically controlled intermediate.
本发明描述了一种选择性制备邻-
氟代取代芳香化合物的方法,其中将含有能够引导邻位
金属化的取代基的芳香化合物与
金属化试剂在反应条件下接触,以形成邻位
金属化的取代芳香化合物。然后,在足以形成所需的邻-
氟代取代芳香化合物的反应条件下,将邻位
金属化的取代芳香化合物与亲电性
氟化试剂反应,然后从反应混合物中回收所得的产物。该方法利用
金属化中间体在进行亲电性
氟化步骤之前,克服了与先前艺术亲电性
氟化过程相关的问题,这些问题不通过区域特异性控制的中间体进行。