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 (compound 89.6, 0.5 g, 2.0 mmol) in MeOH (40 mL) was added KOH (1.11 g, 20.0 mmol). The mixture was heated at 85° C. overnight, then cooled to 0° C. and neutralized to pH 7 with aqueous 1 M HCl. The mixture was extracted with EtOAc (×2), and the combined organic extracts were dried (Na2SO4), filtered, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (hexanes:EtOAc 1:1 to EtOAc) to yield 0.2 g (34%) of the title compound as a white solid. m/z (ES+) 269 (M+H)+. 1H NMR (400 MHz, Chloroform-d) δ 10.96 (br, 1H), 7.82 (s, 1H), 7.35 (s, 1H), 4.11 (s, 3H), 4.15-4.05 (m, 1H), 2.59 (s, 3H), 2.31-2.16 (m, 2H), 2.14-1.89 (m, 3H), 1.87-1.71 (m, 1H).

1. extractionThe mixture was extracted with EtOAc (×2)
2. dry with materialthe combined organic extracts were dried (Na2SO4)
3. filtrationfiltered
4. concentrationconcentrated under reduced pressure
5. customThe residue was purified by silica gel column chromatography (hexanes:EtOAc 1:1 to EtOAc)