反应详情

To a solution of methyl 3-cyano-5-isopropoxybenzoate (1.19 g, 5.4 mmol) in EtOH (4 mL) was added 5N NaOH (3 mL, 15 mmol). After stirring at room temperature for 4 h, the reaction mixture was diluted with 1N HCl and extracted with EA. The combined organic layers were dried over Na2SO4 and concentrated to provide 920 mg (83%) of 3-cyano-5-isopropoxybenzoic acid as a white solid. LCMS-ESI (m/z) calculated for C11H11NO3: 205.2; found 206.1 [M+H]+, tR=2.97 min. 1H NMR (400 MHz, CDCl3) δ 7.93 (t, J=1.4 Hz, 1H), 7.80 (dd, J=2.6, 1.4 Hz, 1H), 7.35 (dd, J=2.6, 1.4 Hz, 1H), 4.71-4.56 (m, 1H), 1.38 (dd, J=6.1, 2.2 Hz, 6H).

1. extractionextracted with EA
2. dry with materialThe combined organic layers were dried over Na2SO4
3. concentrationconcentrated