申请人:ASAHI GLASS COMPANY LTD.
公开号:EP0431373A2
公开(公告)日:1991-06-12
A process for producing a 5-fluorobenzoic acid of the formula (V), which comprises trichloromethylating a fluorobenzene of the formula (I) to obtain a 5-fluorobenzotrichloride of the formula (II), then reacting it with aqueous ammonia to obtain a 5-fluorobenzonitrile of the formula (III), reacting it with a fluorinating agent to obtain a 5-fluorobenzonitrile of the formula (IV) and hydrolyzing it:
wherein each of X₁ , X₃, Y₁ and Y₃ is a halogen atom, and each of X₂ and Y₂ is hydrogen or a halogen atom.
一种生产式(V)的5-氟苯甲酸的工艺,包括将式(I)的氟苯三氯甲基化,得到式(II)的5-氟三氯甲苯,然后与水氨反应,得到式(III)的5-氟苯腈,再与氟化剂反应,得到式(IV)的5-氟苯腈,并将其水解:
其中 X₁、X₃、Y₁ 和 Y₃ 各为卤原子,X₂ 和 Y₂ 各为氢或卤原子。