Water → 1-(6-Bromo-pyridin-2-ylmethyl)-3-(3,4-dimethyl-benzoyl)-6-methyl-1H-[1,5]naphthyridin-4-one

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Reaction Steps

Potassium hexamethyldisilazane (0.49 mL, 0.246 mmol, 0.5 M in THF) was added to a solution of 3-(3,4-Dimethyl-benzoyl)-6-methyl-1H-[1,5]naphthyridin-4-one (60 mg, 0.205) in 2 mL of tetrahydrofuran. After the reaction was stirred at room temperature for 20 minutes 2-bromo-6-bromomethyl-pyridine (61.8 mg, 0.246 mmol) was added and stirred overnight at room temperature. Water and ethyl acetate were added and the two phases were separated. The aqueous phase was extracted with ethyl acetate (3×20 mL). The combined organic layers were dried with magnesium sulfate, filtered and concentrated in vacuo. The crude brown solid was purified by reverse phase HPLC with a C18 column, gradient of 20-70% acetonitrile—0.1% TFA to yield 1-(6-Bromo-pyridin-2-ylmethyl)-3-(3,4-dimethyl-benzoyl)-6-methyl-1H-[1,5]naphthyridin-4-one as an off white solid. LC-MSD, m/z for C24H20BrN3O2 [M+H]: 462.07 LC retention time on HPLC, C18 column gradient 20-95% acetonitrile with 0.1% TFA in 4 minutes: 2.3 min.

Provenance & Evidence