Sodium Bicarbonate → 1-(2-(4-((3-fluoro-4-methylbenzyl)amino)piperidin-1-yl)ethyl)-N-methyl-2-oxo-1,2-dihydroquinoline-4-carboxamide

Beteiligte Stoffe

Reaktionsschritte

To 3.0 mL of methanol suspension containing 0.12 g of 1-(2-(4-aminopiperidin-1-yl)ethyl)-N-methyl-2-oxo-1,2-dihydroquinoline-4-carboxamide hydrochloride, 38 mg of sodium cyanoborohydride, 37 W., of 3-fluoro-4-methylbenzaldehyde and 69 μL of acetic acid were added at room temperature and stirred at the same temperature for 3 hours. Chloroform and aqueous saturated sodium hydrogen carbonate solution were added to be adjusted to pH 10, the organic layer was separated, and the aqueous layer was extracted with chloroform. The organic layer and extracts were combined, washed with aqueous saturated sodium chloride solution, dried over anhydrous magnesium sulfate, and the solvent was removed under reduced pressure. The residue thus obtained was purified by flash silica gel column chromatography [gradient elution of chloroform:methanol=100:0-70:30], to give 26 mg of 1-(2-(4-((3-fluoro-4-methylbenzyl)amino)piperidin-1-yl)ethyl)-N-methyl-2-oxo-1,2-dihydroquinoline-4-carboxamide as a white solid.

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