反应详情

To a solution of 3-bromo-5-isopropoxy-benzonitrile (6.0 g, 24.78 mmol) in EtOH (80 ml) was added water (8.0 ml), followed by 50% NaOH (6.52 ml, 123.91 mmol). The reaction mixture was then refluxed for 2 hrs, concentrated down, re-dissolved in water, acidified with HCl, extracted with EtOAc. The EtOAc layer was separated, dried over MgSO4, filtrated, and concentrated to afford the final product 3-bromo-5-isopropoxy-benzoic acid (6.36 g, 100%). 1H NMR (300 MHz, DMSO-d6): δ 13.31 (s, 1H), 7.56 (s, 1H), 7.36 (m, 2H), 4.70 (m, 2H), 1.25 (d, J=6.0 Hz, 6H). LC-MS m/z=260.4 [C10H11BrO3+H]+.

1. temperatureThe reaction mixture was then refluxed for 2 hrs
2. concentrationconcentrated down
3. dissolutionre-dissolved in water
4. extractionextracted with EtOAc
5. customThe EtOAc layer was separated
6. dry with materialdried over MgSO4
7. filtrationfiltrated
8. concentrationconcentrated