Acetic Anhydride → HCID 69481486, compound

Participants

Reaction Steps

A solution of ethyl 7-[(4-fluorophenyl)methyl]-4-hydroxy-1-[2-(methyl {[(phenylmethyl)oxy]carbonyl}amino)ethyl]-2-oxo-1,2-dihydro-1,5-naphthyridine-3-carboxylate (0.023 g, 0.043 mmol) in CH2Cl2 (1.5 mL) was combined with diisopropylethylamine (0.0038 mL, 0.22 mmol), acetic anhydride (0.021 mL, 0.22 mmol) and Pd/C (0.012 g, 10% w/w). The resulting suspension was flushed with nitrogen and evacuated several times the charged with hydrogen under a balloon and stirred at ambient temperature overnight. The reaction mixture was filtered, washed with CH2Cl2, and concentrated in vacuo. The residue was dissolved in CH2Cl2, washed with 1N NaHSO4, and brine, concentrated the organics to afford the title compound as an oil: 1H NMR (400 MHz, DMSO-d6) δ ppm 1.22 (d, J=6.59 Hz, 3 H), 1.86 (s, 3 H), 2.94 (s, 3 H), 3.50 (t, J=6.86 Hz, 2 H), 4.18 (s, 2 H), 4.28 (q, J=6.83 Hz, 4 H), 7.12 (t, J=8.69 Hz, 2 H), 7.35-7.40 (m, 2 H), 8.02 (d, J=6.40 Hz, 1 H), 8.47 (s, 1 H); ES+ MS: 442 (M+H+).

Provenance & Evidence