Trifluoroacetic acid → HCID 69096290, compound

Participants

Reaction Steps

A solution of 7-((4-methoxybenzyl)(methyl)amino)-3-(5-amino-2-chloro-4-fluorophenyl)-1-methyl-1,6-naphthyridin-2(1H)-one (3 g, 6.6 mmol) in CH2Cl2 (50 mL) was treated with TFA (20 mL) and the mixture was heated to reflux overnight. The mixture was concentrated under reduced pressure, the residue was dissolved in 10% aq. of HCl (50 mL) and the aqueous layer was washed with EtOAc. The aqueous layer was neutralized with NaHCO3 aq. solution to pH 8, and then extracted with EtOAc (3×50 mL). The combined organics were washed with brine, dried (Na2SO4) and concentrated in vacuo to give 3-(5-amino-2-chloro-4-fluorophenyl)-1-methyl-7-(methylamino)-1,6-naphthyridin-2(1H)-one (1.6 g, 72% yield) 1H NMR (300 MHz, DMSO-d6): δ 8.36 (s, 1 H), 7.66 (s, 1 H), 7.17 (d, J=10.8 Hz, 1 H), 7.05 (m, 1H), 6.71 (d, J=9.6 Hz, 1 H), 6.15 (s, 1 H), 5.30 (s, 2 H), 3.47 (s, 3 H), 3.42 (s, 1 H), 2.84 (d, J=4.4 Hz, 3 H); MS (ESI) m/z: 333.1 [M+H]+

Provenance & Evidence