反应详情

温度

85 °C

2-Chloro-4-trifluoromethoxy-phenylamine (2.0 g, 9.29 mmol) in toluene (50 mL) was added to trimethylaluminum (2.0 M 4.65 mL) then methyl 5-(methylsulfonyl)picolinate 6 (1.0 g, 4.65 mol) was added and the mixture was heated to 80-90° C. for 2 h. The reaction was cooled down and 1N HCl solution (10 mL) was added to be acidic. Dichloromethane (100 mL) was then added and the organic phase was further washed with water (100 mL) and dried over sodium sulfate. The solvent was removed and the residue was mixed with ether (50 mL) and stirred for 0.5 h. The solid was filtered and dried to give 5-methanesulfonyl-pyridine-2-carboxylic acid (2-chloro-4-trifluoromethoxy-phenyl)-amide 7 as a light yellow solid. Yield: 1.26 g, 65%.

1. temperatureThe reaction was cooled down
2. washthe organic phase was further washed with water (100 mL)
3. dry with materialdried over sodium sulfate
4. customThe solvent was removed
5. additionthe residue was mixed with ether (50 mL)
6. filtrationThe solid was filtered
7. customdried