反应详情

A mixture of N-[(1S)-1-(3-aminophenyl)ethyl]-6-chloropyrazin-2-amine (300 mg, 1.2 mmol), 6-methylnicotinic acid (182 mg, 1.32 mmol), N-(3-dimethylaminopropyl)-N′-ethylcarbodiimide hydrochloride (277 mg, 1.45 mmol), 4-pyrrolidinopyridine (36 mg, 0.24 mmol) and triethylamine (0.34 mL, 2.4 mmol) in dichloromethane (6 mL) was stirred at room temperature for 72 hours. After this time the mixture was diluted with ethyl acetate (20 mL), washed successively with saturated aqueous sodium hydrogen carbonate (2×15 mL) and brine (15 mL), dried (Na2SO4) and concentrated under reduced pressure to give a yellow oil which was purified by flash chromatography (silica, ethyl acetate/hexanes) to give N-(3-{(1S)-1-[(6-chloropyrazin-2-yl)amino]ethyl}phenyl)-6-methylnicotinamide (380 mg, 86%) as a white solid.

1. washwashed successively with saturated aqueous sodium hydrogen carbonate (2×15 mL) and brine (15 mL)
2. dry with materialdried (Na2SO4)
3. concentrationconcentrated under reduced pressure
4. customto give a yellow oil which
5. customwas purified by flash chromatography (silica, ethyl acetate/hexanes)