反应详情

温度

140 °C

To a slurry of 4-(hydroxymethyl)benzoic acid (0.220 g, 1.443 mmol) in DMF (1.640 ml) was added EDC (0.277 g, 1.443 mmol) followed by HOBT hydrate (0.195 g, 1.443 mmol). After about 45 min. a solution of (Z)-3-chloro-N′-hydroxy-4-isopropoxybenzimidamide (0.300 g, 1.31 mmol) in DMF (1.640 ml) was added and the reaction mixture was heated to about 140° C. for about 2 h. After cooling to room temperature the reaction mixture was concentrated in vacuo and purified by chromatography on silica gel (eluting with EtOAc/Hep) to provide (4-(3-(3-chloro-4-isopropoxyphenyl)-1,2,4-oxadiazol-5-yl)phenyl)methanol (0.336 g, 71%) as an off-white solid. LCMS (Table 1, Method c) Rt=2.80 min, m/z 345 (M+H)+.

1. temperatureAfter cooling to room temperature the reaction mixture
2. concentrationwas concentrated in vacuo
3. custompurified by chromatography on silica gel (eluting with EtOAc/Hep)