The present invention relates to a method for purifying a compound represented by the formula (I), the method including treating a mixture containing the compound represented by the formula (I) and a compound represented by the formula (II) with an aqueous solution of a basic compound.
where, in the formula (I), R1 represents a hydrogen atom or a chlorine atom; in the formula (II), R2, R3 and R4 are the same or different from each other and represent a hydrogen, a chlorine atom or a fluorine atom independently, at least one of R3 and R4 represent a chlorine atom or a fluorine atom, and, in the case where R3 represents a chlorine atom, R4 represents a chlorine atom or a fluorine atom.
本发明涉及一种提纯式(I)化合物的方法,该方法包括用碱性化合物
水溶液处理含有式(I)化合物和式(II)化合物的混合物。
其中,在式(I)中,R1代表氢原子或
氯原子;在式(II)中,R2、R3和R4彼此相同或不同,并分别代表氢原子、
氯原子或
氟原子,R3和R4中至少有一个代表
氯原子或
氟原子,在R3代表
氯原子的情况下,R4代表
氯原子或
氟原子。