Processes for producing 5-fluorbenzoic acids and their intermediates
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.