Trifluoroacetic acid → HCID 90073736, 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 (27 mg, 0.060 mmol) was dissolved in CH2Cl2 (2 mL). Trifluoroacetic acid (1 mL) was added, and the mixture was stirred at r.t. for 1 h. Solvent and excess TFA were removed in vacuo. To the residue were added THF (3 mL), triethylamine (0.050 mL), and ethyl trifluoroacetate (2 mL), and the resulting mixture was refluxed for 16 h. After cooling to r.t., mixture was concentrated to dryness. 0.1 M HCl and EtOAc were added, and the aqueous layer was extracted with additional EtOAc. The organic layers were combined, dried over MgSO4, and concentrated. The crude product was purified by silica gel chromatography (0-5% MeOH/CH2Cl2) to give 16.4 mg of the title compound as a pale yellow solid. MS: (+) m/z 449.23 (M+1).

Provenance & Evidence