反应详情

温度

110 °C

5-(2-Cyclopropyl-2-oxoethylamino)-2-fluoro-4-methylbenzonitrile (14.19 g, 61.2 mmol) was dissolved in glacial acetic acid (300 mL). Potassium thiocyanate (11.9 g, 122.4 mmol) was added as a solid with stirring. The reaction mixture was heated to 110° C. for 4 hours at which time the solvent was removed under reduced pressure. The residue was taken up in dichloromethane (200 mL) and washed with 200 mL water. The aqueous extract was extracted with (2×200 mL) additional dichloromethane, the organic extracts combined and dried over magnesium sulfate. The solvent was removed under reduced pressure and the oily residue was re-dissolved in EA (50 mL) and 150 mL hexanes was added. A dark layer formed and a stir bar was added to the flask. Vigorous stirring caused the product to precipitate as a peach colored solid. The product was collected by filtration, to yield 5-(4-cyclopropyl-2-mercapto-1H-imidazol-1-yl)-2-fluoro-4-methylbenzonitrile, (14.26 g, 52.23 mmol). Anal. LC/MS (m/z: 274, M+1)

1. customwas removed under reduced pressure
2. washwashed with 200 mL water
3. extractionThe aqueous extract
4. extractionwas extracted with (2×200 mL) additional dichloromethane
5. dry with materialdried over magnesium sulfate
6. customThe solvent was removed under reduced pressure
7. dissolutionthe oily residue was re-dissolved in EA (50 mL)
8. addition150 mL hexanes was added
9. customA dark layer formed
10. additiona stir bar was added to the flask
11. stirringVigorous stirring
12. customto precipitate as a peach
13. filtrationThe product was collected by filtration