Dimethylformamide → HCID 86610778, compound

Participants

Reaction Steps

To a stirred suspension of NaH (112 mg, 2.80 mmol, 60% dispersion in mineral oil) in DMF (5 mL) at 0° C. was added 3-nitro-2-(2,2,2-trifluoro-acetylamino)-benzoic acid methyl ester (750 mg, 2.55 mmol) portion wise. The resulting mixture was stirred for 1 h, then Mel (175 mL, 2.80 mmol) was added and the progress of the reaction was followed by LCMS. Upon consumption of 3-nitro-2-(2,2,2-trifluoro-acetylamino)-benzoic acid methyl ester, the reaction mixture was quenched with aqueous NH4Cl, and extracted with EtOAc. The combined extracts were washed with brine, dried (Na2SO4), filtered, and concentrated under reduced pressure. The residue was purified by chromatography on silica gel using ethyl acetate-hexane to provide 2-[methyl-(2,2,2-trifluoro-acetyl)-amino]-3-nitro-benzoic acid methyl ester. MS m/z: 275.0 (M+H)+.

Provenance & Evidence