Trifluoroacetic acid → HCID 60151265, compound

Participants

Reaction Steps

{2-[(7-Benzyl-4-hydroxy-8-oxo-7,8-dihydro-[2,7]naphthyridine-3-carbonyl)-amino]-ethyl}-carbamic acid tert-butyl ester (30 mg, 0.068 mmol) was dissolved in CH2Cl2 (1.5 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 THF (3 mL), triethylamine (0.050 mL, 0.34 mmol), and ethyl trifluoroacetate (2 mL), and the mixture was refluxed for 48 h. After cooling to r.t., the mixture was concentrated to dryness. The residue was partitioned between EtOAc and water, and pH was adjusted to about 4 with 1 M HCl. The organic layer was dried over MgSO4 and concentrated. The crude product was purified by silica gel chromatography (0-5% MeOH/CH2Cl2) to give 12 mg of the title compound as a pale yellow solid. MS: (+) m/z 435.31 (M+1).

Provenance & Evidence