Methyl iodide → HCID 70665035, compound

Participants

Reaction Steps

To a solution of methyl 3-(tert-butylamino)-2-(4-fluorophenyl)quinoxaline-6-carboxylate (115 mg, 0.33 mmol) in tetrahydrofuran (30 mL) was added sodium hydride (65 mg, 2.71 mmol) at 0° C. and then stirred for 10 minutes at room temperature. Methyliodide (185 mg, 1.30 mmol) was then added with stirring, and the reaction was allowed to proceed overnight at room temperature. The reaction was quenched with water (50 mL), adjusted to pH 5 with HCl (3N), extracted with ethyl acetate (3×80 mL) and the organic layers combined, dried over anhydrous magnesium sulfate and concentrated in vacuo to give the residue. Purification via Prep-HPLC under the following conditions [(Agilent 1200 prep HPLC): Column, SunFire Prep C18, 19*50 mm 5 um; mobile phase, water with 0.05% TFA and CH3CN (10% CH3CN up to 45% in 10 min); Detector, UV 220 nm] afforded 3-(tert-butyl(methyl)amino)-2-(4-fluorophenyl)quinoxaline-6-carboxylic acid as a light yellow solid (8.20 mg, 7.13%).

Provenance & Evidence