A method of preparing vicinal difluoro aromatic compounds in high yield from hydroxy aromatic compounds using various bases and a method of preparing intermediates thereof. A method for making a vicinal difluoro halogenated aromatic compound including providing a tetrafluoro derivative of a halogen substituted aromatic compound, wherein the tetrafluoro derivative has two fluorine atoms on each of two adjacent carbons and at least one additional halogen substituent; reacting the tetrafluoro derivative with a reducing agent in presence of a base for a reaction time sufficient to form the vicinal difluoro halogenated aromatic compound containing two vicinal fluorine substituents and the at least one additional halogen substituent, wherein the reducing agent is used in a reducing agent effective amount sufficient to retain the at least one additional halogen substituent.
一种从羟基芳香化合物中使用各种碱制备高产率邻二
氟芳香化合物的方法,以及制备其中间体的方法。一种制备邻二
氟卤代芳香化合物的方法,包括提供卤代芳香化合物的四
氟衍
生物,其中四
氟衍
生物在两个相邻碳上各有两个
氟原子和至少一个额外的卤素取代基;将四
氟衍
生物与还原剂在碱的存在下反应,反应时间足以形成含有两个邻二
氟氟取代基和至少一个额外卤素取代基的邻二
氟卤代芳香化合物,其中还原剂用于还原剂有效量足以保留至少一个额外卤素取代基。