N-bromobutanimide → 1-Benzyl-8-bromo-5-hydroxy-2-oxo-3-(2-trifluoromethyl-phenyl)-1,2-dihydro-[1,7]naphthyridine-6-carboxylic acid methyl ester

Participants

Reaction Steps

A mixture of 1-benzyl-5-hydroxy-2-oxo-3-(2-trifluoromethyl-phenyl)-1,2-dihydro-[1,7]naphthyridine-6-carboxylic acid methyl ester (85 mg, 0.19 mmol) and N-bromosuccinimide (37 mg, 0.21 mmol) in CH2Cl2 (0.8 mL) was refluxed for 3 h. Solvent was evaporated in vacuo, and the residue was purified by silica gel chromatography (5-30% EtOAc/hexanes+1% AcOH) to give 80 mg of the title compound as a yellow solid. MS: (−) m/z 531.17, 533.12 (M−1, 79/81Br).

Provenance & Evidence