Ibuprofen, (+-)- → HCID 66909871, compound

Participants

Reaction Conditions

Reaction Steps

Benzyl 4-({2-[4-(2-methylpropyl)phenyl]propanoyl}oxy)butanoate was synthesized from benzyl-4-bromo)butanoate, 2-[4-(2-methylpropyl)phenyl]propanoic acid and potassium carbonate. To a solution of benzyl-4-bromobutanoate (2.0 g, 7.8 mmol) in acetonitrile (20 ml) at ambient temperature was added potassium carbonate (1.13 g, 8.2 mmol) and 2-[4-(2-methylpropyl)phenyl]propanoic acid (1.6 g, 7.8 mmol). The reaction was heated to 90° C. for 18hours and monitored by TLC (4:1 heptane:EtOAc) The mixture was allowed to cool to room temperature and concentrated in vacuo. The crude product was partitioned between water and EtOAc and the organic phase was separated, dried over Na2SO4, filtered and concentrated in vacuo. The title compound was purified by silica column chromatography eluting with heptane:EtOAc (4:1, v:v) and isolated as a clear, colorless oil (2.5 g, 84% yield). 1H NMR (250 MHz, CHLOROFORM-d) δ ppm 7.30-7.46 (5H, m), 7.02-7.23 (4H, m), 5.11 (2H, s), 3.99-4.21 (2H, m), 3.68 (1H, q, 7.2 Hz), 2.43 (2H, d, 7.2 Hz), 2.27-2.39 (2H, m), 1.73-2.04 (3H, m), 1.48 (3H, d, 7.2 Hz) 0.89 (6H, d, 6.6 Hz).

Provenance & Evidence