反应详情

温度

100 °C

5-(4-Cyclopropyl-1H-imidazol-1-yl)-2-fluoro-4-methylbenzonitrile (11.21 g, 46.50 mmol) was placed in a round bottom flask fitted with a reflux condenser, and suspended in 38% hydrochloric acid (200 mL). The mixture was heated to 100° C. for 4.5 hours, and then cooled to room temperature. Solvent was removed under reduced pressure to give a pink solid, to which was added 100 ml of EA. The solid product was collected by filtration and washed with 3×100 mL EA. To the solid product was added 100 mL 10% methanol in dichloromethane, the mixture stirred, and the filtrate collected. This was repeated with 2 more 100 ml portions of 10% methanol in dichloromethane. The filtrates were combined and solvent was removed under reduced pressure, to provide crude 5-(4-cyclopropyl-1H-imidazol-1-yl)-2-fluoro-4-methylbenzoic acid hydrochloride. No further purification was carried out (11.13 g, 37.54 mmol). Anal. LC/MS (m/z: 261, M+1)

1. customfitted with a reflux condenser
2. temperaturecooled to room temperature
3. customSolvent was removed under reduced pressure
4. customto give a pink solid
5. filtrationThe solid product was collected by filtration
6. washwashed with 3×100 mL EA
7. additionTo the solid product was added 100 mL 10% methanol in dichloromethane
8. customthe filtrate collected
9. customsolvent was removed under reduced pressure