反应详情

温度

85 °C

To a solution of 5-(5-amino-1,3,4-oxadiazol-2-yl)-4-cyclobutyl-2-methylbenzonitrile (219.6, 0.5 g, 2.0 mmol) in EtOH (40 ml) was added KOH (1.11 g, 20.0 mmol). The mixture was heated at 85° C. overnight. After cooling to ambient temperature, the mixture was neutralized to pH 7 with 1N HCl at 0° C. and then extracted with EtOAc (×2). The combined organic layers were dried (Na2SO4) and concentrated. The residue was purified using column (silica gel) chromatography (hexanes:EtOAc 1:1 to EtOAc). Yield: 0.2 g, white solid, 34%. m/z (ES+) 283 (M+H)+. 1H NMR (400 MHz, Chloroform-d) δ 7.84 (s, 1H), 7.35 (s, 1H), 4.48 (t, 2H), 4.19-4.10 (m, 1H), 2.58 (s, 3H), 2.30-2.19 (m, 2H), 2.11-1.95 (m, 3H), 1.85-1.76 (m, 1H), 1.45 (t, 3H).

1. temperatureAfter cooling to ambient temperature
2. extractionextracted with EtOAc (×2)
3. dry with materialThe combined organic layers were dried (Na2SO4)
4. concentrationconcentrated
5. customThe residue was purified