Trifluoroacetic acid → 1-{[(7-Benzyl-1-cyano-4-hydroxy-8-oxo-7,8-dihydro-[2,7]naphthyridine-3-carbonyl)-amino]-methyl}-cyclobutanecarboxylic acid

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Reaction Steps

1-{[(7-Benzyl-1-cyano-4-hydroxy-8-oxo-7,8-dihydro-[2,7]naphthyridine-3-carbonyl)-amino]-methyl}-cyclobutanecarboxylic acid tert-butyl ester (32 mg, 0.066 mmol) was dissolved in 2 mL of CH2Cl2. Trifluoroacetic acid (0.4 mL) was added, and the mixture was stirred at r.t. for 2 h. The mixture was concentrated in vacuo, and the residue was dissolved in saturated NaHCO3. The aqueous solution was washed with ether, and then acidified to pH about 1 with 4 M HCl to give a white suspension. The solid was isolated by filtration and dried under vacuum to give 22 mg of the title compound as an off-white solid. MS: (+) m/z 433.35 (M+1).

Provenance & Evidence