2-Butynoic acid → N-(2-(6-(5-bromo-1-methyl-2-oxo-1,2-dihydropyridin-3-ylamino)pyridin-2-yloxy)ethyl)but-2-ynamide

Participants

Reaction Steps

A mixture of 3-(6-(2-aminoethoxyl)pyridin-2-ylamino)-5-bromo-1-methylpyridin-2(1H)-one hydrochloride 103a (1.0 g, 2.66 mmol), but-2-ynoic acid (268 mg, 3.19 mmol), HATU (1.21 g, 3.19 mmol) and DIPEA (1.14 mL, 6.65 mmol) in DMF (10 mL) was stirred at rt overnight. The reaction mixture was diluted with EA and washed with water. The organic layer was separated, dried over Na2SO4, filtered and concentrated. The residue was washed with PE/EA (2 mL/20 mL) and dried to give N-(2-(6-(5-bromo-1-methyl-2-oxo-1,2-dihydropyridin-3-ylamino)pyridin-2-yloxy)ethyl)but-2-ynamide 116a (800 mg, 74%) as light yellow solid. ESI-LCMS: m/z=404.9

Provenance & Evidence