Sodium Hydroxide → 5-bromo-3-(cyclopentyl(ethyl)amino)-N-((4,6-dimethyl-2-oxo-1,2-dihydropyridin-3-yl)methyl)-2-methylbenzamide

Participants

Reaction Conditions

Reaction Steps

Aqueous NaOH (0.126 g, 3.09 mmol) was added to a solution of methyl 5-bromo-3-(cyclopentyl(ethyl)amino)-2-methylbenzoate (0.7 g, 2.06 mmol) in ethanol (5 mL) and stirred at 60° C. for 1 h. After completion of the reaction, ethanol was removed under reduced pressure and the aqueous layer acidified using dilute HCl to pH 6 and citric acid to pH 4. The product was extracted using ethyl acetate. Combined organic layers were dried and concentrated to give the crude acid (0.5 g, 75%). The acid (0.5 g, 1.53 mmol) was then dissolved in DMSO (5 mL) and 3-(amino methyl)-4,6-dimethylpyridin-2(1H)-one (0.467 g, 3.07 mmol) was added to it. The reaction mixture was stirred at room temperature for 15 min before PYBOP (1.19 g, 2.30 mmol) was added to it and stirring was continued for overnight. After completion of the reaction, the reaction mixture was poured into ice, extracted with 10% MeOH/DCM. Combined organic layers were dried and concentrated, then the product was purified by column chromatography to afford 5-bromo-3-(cyclopentyl(ethyl)amino)-N-((4,6-dimethyl-2-oxo-1,2-dihydropyridin-3-yl)methyl)-2-methylbenzamide (0.3 g, 42%).

Provenance & Evidence