反应详情

温度

100 °C

Iron powder-325 mesh (4.6 g, 82 mmol) was added to a 500 mL round bottom flask charged with a mixture of 4-chloro-1-(2-methoxy-4-nitrophenyl)-1H-imidazole (5.2 g, 20.5 mmol), absolute ethanol (100 mL), and glacial acetic acid (50 mL). A water-cooled reflux condenser was attached to the flask and the heterogeneous mixture was heated to 100° C. with vigorous stirring for 30 min. The reaction mixture allowed to cool to rt and was added to a chilled and stirred solution of 3 M NaOH (291 mL). The resulting mixture was poured into a separatory funnel and extracted with EtOAc (3×250 mL). The combined organic layers were dried over sodium sulfate, filtered, and concentrated in vacuo to afford 4-(4-chloro-1H-imidazol-1-yl)-3-methoxyaniline (4.57 g, 97% yield) as a solid. LC-MS (M+H)+224.0. 1H NMR (500 MHz, CDCl3) δ ppm 7.47 (d, J=1.22 Hz, 1H) 7.00 (d, J=8.24 Hz, 1H) 6.99 (d, J=1.53 Hz, 1H) 6.32 (d, J=2.44 Hz, 1H) 6.29 (dd, J=8.24, 2.44 Hz, 1H) 3.88 (br. s., 2H) 3.78 (s, 3H).

1. temperaturereflux condenser
2. temperatureto cool to rt
3. additionwas added to
4. temperaturea chilled
5. additionThe resulting mixture was poured into a separatory funnel
6. extractionextracted with EtOAc (3×250 mL)
7. dry with materialThe combined organic layers were dried over sodium sulfate
8. filtrationfiltered
9. concentrationconcentrated in vacuo