反应详情

温度

80 °C

Acetyl chloride (4.45 mL, 62.6 mmol) was added to a solution of 2-chloro-4-[3-(trifluoromethoxy)phenyl]-pyridine [CAS 1261856-64-7] (11.42 g, 41.73 mmol) and sodium iodide (31.28 g, 208.67 mmol) in MeCN (200 mL) under N2, and the resulting suspension was heated at 80° C. for 18 hrs. Additional sodium iodide was added (20 mol %) and stirring was continued for 3 hrs. The reaction was cooled and the mixture was treated with aqueous sodium carbonate. After 5 minutes, solid sodium metabisulphite was added until decolourisation achieved. Water was added to redissolve a precipitate which had formed. The mixture was diluted with EtOAc and the layers separated. The aqueous layer was washed with EtOAc (2×), the combined organics were dried (MgSO4) and the solvent evaporated to afford the crude 2-iodo-4-[3-(trifluoromethoxy)phenyl]pyridine (D9) (16.3 g) as a amber oil containing about ˜5% of reduced 2-H material and ˜8% of unreacted chloride starting material;

1. temperatureThe reaction was cooled
2. waitAfter 5 minutes
3. dissolutionto redissolve a precipitate which
4. customhad formed
5. customthe layers separated
6. washThe aqueous layer was washed with EtOAc (2×)
7. dry with materialthe combined organics were dried (MgSO4)
8. customthe solvent evaporated