反应详情

温度

60 °C

A solution of methyl 2-(methoxymethyl)-2′-methylbiphenyl-4-carboxylate (40 g; 148 mmol; 1 eq.) in EtOH (1.2 L) at RT was treated with NaOH (89 mL; 5 M; 445 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 HCl cc (40 mL) to 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 g, 92%). 1H NMR (DMSO-d6, 300 MHz) δ 12.99 (br s, 1H), 8.09 (s, 1H), 7.92-7.89 (m, 1H), 7.33-7.22 (m, 4H), 7.10-7.08 (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