[CH3:1][C:2]1[C:11]([N+:12]([O-])=O)=[CH:10][C:9]([C:15]([F:18])([F:17])[F:16])=[CH:8][C:3]=1[C:4]([O:6][CH3:7])=[O:5].C(O)C.[NH4+].[Cl-]>[Fe]>[NH2:12][C:11]1[C:2]([CH3:1])=[C:3]([CH:8]=[C:9]([C:15]([F:16])([F:17])[F:18])[CH:10]=1)[C:4]([O:6][CH3:7])=[O:5]To a stirred solution of methyl 2-methyl-3-nitro-5-(trifluoromethyl)benzoate (1 equiv.) in ethanol (2 mL per 1 mmol), was added NH4Cl solution (5.1 equiv., dissolved in water. Volume of water equivalent to volume of ethanol) followed by Fe powder (8 equiv.). the resulting reaction mixture was stirred at 90° C. for 1 h. On completion, the reaction mixture was filtered and the filtrate concentrated till dryness. The resulting solid was dissolved in saturated sodium bicarbonate solution and the aqueous layer extracted with ethyl acetate. The combined organic layers were dried over sodium sulfate and concentrated to afford solid methyl 3-amino-2-methyl-5-(trifluoromethyl)benzoate in quantitative yield.
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