Methyl iodide → (S)-2-sec-Butylamino-6-(methanesulfonyl-methylamino)-isonicotinic acid methyl ester

Participants

Reaction Steps

Add sodium hydride (47 mg, 1.18 mmol, 60% dispersion in mineral oil) to a solution of (S)-2-sec-butylamino-6-methanesulfonylamino-isonicotinic acid methyl ester (356 mg, 1.18 mmol) in DMF (5 mL) at 0° C. Stir for 10 min, add iodomethane (0.11 mL, 1.77 mmol) dropwise. Stir the mixture at room temperature for 2 h, cool and quench the reaction with an ammonium chloride solution. Extract the mixture with ethyl acetate (3×30 mL) and wash the combined extract with water, saturated aqueous sodium chloride, dry (magnesium sulfate), concentrate and purify (silica gel chromatography, eluting with 20:80 ethyl acetate:hexanes) to give the title compound (320 mg, 86%).

Provenance & Evidence