反应详情

温度

20 °C

1,1′-Thiocarbonyldiimidazole (423 g, 2.37 mol) was dissolved in dichloromethane (3200 ml). The mixture was stirred under N2 atmosphere while a solution of 3-tert-butoxy-5-fluoroaniline (435 g, 2.37 mol) in dichloromethane (800 ml) was added slowly within 2 h. Then the mixture was kept stirring at 20° C. for 16 h. The mixture was diluted with water (3000 ml). The separated dichloromethane phase was washed again with water (3000 ml) before dried with anhydrous Na2SO4 for 2 h. The mixture was filtered and the filtrate was concentrated under vacuum to remove solvent to give 1-tert-butoxy-3-fluoro-5-isothiocyanato-benzene (499 g). 1H-NMR (400 MHz, CDCl3): 6.63-6.68 (m, 3H), 1.37 (s, 9H).

1. additionwas added slowly within 2 h
2. washThe separated dichloromethane phase was washed again with water (3000 ml)
3. dry with materialbefore dried with anhydrous Na2SO4 for 2 h
4. filtrationThe mixture was filtered
5. concentrationthe filtrate was concentrated under vacuum
6. customto remove solvent