反应详情

温度

-78 °C

Dissolve 4-chlorosulfonyl-benzoyl chloride (3.18 g, 13.3 mmol) in THF (25 mL) and cool to −78° C. Slowly add a pre-mixed solution of 4-fluoro-3-methoxybenzyl-amine (1.91 g, 12.3 mmol), Et3N (1.64 mL, 11.8 mmol), and DMAP (150 mg, 1.23 mmol) in THF (25 mL) to the above cooled solution over 1 h. Stir the resulting mixture at −78° C. for 1 h, then warm to RT and stir for 4 h. Remove all solids by filtration and wash with THF (5 mL). Concentrate the filtrate and re-dissolve the crude material in EtOAc (30 mL) and wash with 1N HCl (30 mL). Separate the organic and aqueous layers and extract the aqueous phase with additional EtOAc (30 mL). Combine the organic solutions dry, filter, and concentrate. Purify the crude material by flash chromatography, using a linear gradient of 100% hexanes to 40% EtOAc/hexanes) to give the title compound as a white solid (1.36 g, 28%). MS (ES−) 356.1 (M−1)−. 1H NMR (400 MHz, CDCl3): δ 8.11 (d, 2H, J=8.3), 8.00 (d, 2H, J=8.8), 7.05 (dd, 1H, J=8.2, 11.1), 6.96 (dd, 1H, J=1.9, 8.0), 6.86 (m, 1H), 6.44 (br s, 1H), 4.61 (d, 2H, J=5.7), 3.88 (s, 3H).

1. temperaturewarm to RT
2. stirringstir for 4 h
3. customRemove all solids
4. filtrationby filtration
5. washwash with THF (5 mL)
6. concentrationConcentrate the filtrate
7. dissolutionre-dissolve the crude material in EtOAc (30 mL)
8. washwash with 1N HCl (30 mL)
9. customSeparate the organic and aqueous layers
10. extractionextract the aqueous phase with additional EtOAc (30 mL)
11. customCombine the organic solutions dry
12. filtrationfilter
13. concentrationconcentrate
14. customPurify the crude material by flash chromatography