反应详情

温度

60 °C

A solution of methyl 2-(methoxymethyl)-2′-methylbiphenyl-4-carboxylate (40.0 g, 148.0 mmol) in EtOH (1.2 L) at RT was treated with a 5N aqueous solution of NaOH (90 mL, 450 mmol). The reaction mixture was stirred at 60° C. for 1 hour. The reaction mixture was cooled to RT and concentrated to give a yellow solid which was taken up in water (800 mL) and the aqueous phase was washed twice with EtOAc. The aqueous phase was acidified with a concentrated aqueous solution of HCl (40 mL, pH˜2) and it was extracted with EtOAc (2×400 mL). The combined organics were washed with brine, dried over MgSO4 and concentrated affording the title compound as a yellow solid (35.1 g, 92%). 1H NMR (DMSO-d6, 300 MHz) δ 12.99 (br s, 1H), 8.09 (s, 1H), 7.91 (m, 1H), 7.33-7.22 (m, 4H), 7.09 (m, 1H), 4.11 (m, 2H), 3.18 (s, 3H), 1.99 (s, 3H). LC/MS (Method B): 255.2 (M−H)−. HPLC (Method A) Rt 4.52 min (Purity: 96.4%).

1. temperatureThe reaction mixture was cooled to RT
2. concentrationconcentrated
3. customto give a yellow solid which
4. washthe aqueous phase was washed twice with EtOAc
5. extractionwas extracted with EtOAc (2×400 mL)
6. washThe combined organics were washed with brine
7. dry with materialdried over MgSO4
8. concentrationconcentrated