| abstract |
The present invention provides a process for producing a 2-substituted-3,4-fused heterocyclic benzoic acid, for example a 2-alkyl-3,4-fused heterocyclic benzoic acid or a 2-halo-3,4-fused heterocyclic benzoic acid, comprising effectively admixing a 3,4-fused heterocyclic benzoic acid and an alkyl lithium reagent followed by subsequent reaction with an electrophilic reagent. |