Sodium hydride → HCID 57426194, compound

Participants

Reaction Steps

Sodium hydride (26.7 mg of a 60% dispersion in mineral oil, 0.66 mmol) was added to a solution of tert-butyl (4-nitro-2-oxo-2,3-dihydro-1H-benzimidazol-1-yl)acetate from Step A (96 mg, 0.327 mmol) in DMF (5 mL). After 10 nm in, methyl 4-bromobutyrate (178 mg, 0.98 mmol) was added and the reaction was stirred at room temperature for 18 h. The mixture was quenched with H2O and extracted with EtOAc. The organic extract was washed with brine, dried over Na2SO4, filtered, and concentrated in vacuo. The residue was purified by HPLC using a reversed phase C18 column and eluting with a gradient of H2O:CH3CN:CF3CO2H—90:10:0.1 to 5:95:0.1. Lyophilization provided the title compound. MS: m/z=394 (M+1).

Provenance & Evidence