Hydrochloric Acid → HCID 86714175, compound

Participants

Reaction Steps

{3-[(7-Benzyl-4-hydroxy-8-oxo-7,8-dihydro-[2,7]naphthyridine-3-carbonyl)-amino]-propyl}-carbamic acid tert-butyl ester (81 mg, 0.18 mmol) was dissolved in CH2Cl2 (2 mL). Trifluoroacetic acid (1 mL) was added, and the mixture was stirred at r.t. for 2 h. Solvent and excess TFA were removed in vacuo. To the residue were added CH2Cl2 (3 mL), triethylamine (0.25 mL, 1.79 mmol), and acetic anhydride (0.085 mL, 0.90 mmol), and the resulting mixture was stirred at r.t. for 16 h. The mixture was concentrated to dryness, and the residue was dissolved in MeOH (3.6 mL) and treated with NaOMe (3.6 mL, 1.79 mmol, 0.5 M in MeOH) for 1 h at r.t. 1 M HCl was added until pH was about 3-4, and the mixture was extracted with EtOAc. The organic layer was dried over MgSO4 and concentrated. The crude product was purified by silica gel chromatography (0-5% MeOH/CH2Cl2) to give 37 mg of the title compound as an off-white solid. MS: (+) m/z 395.38 (M+1).

Provenance & Evidence