反应详情

4-Chloro-2-trifluoroacetylaniline, hydrochloride hydrate (84.4 g, 304 mmol), cyclohexane (350 mL), MTBE (95 mL), and water (100 mL) were stirred at room temperature. The resulting slurry was neutralized with 30 mL 10 N NaOH. To the organic phase was added trityl alcohol (91.0 g, 350 mmol) and TsOH (0.36 g, 1.9 mmol). The mixture was heated to reflux and 300 mL of solvent was distilled. Acetonitrile (350 mL) and diisopropylethyl amine (0.5 mL) were added and the distillation continued to remove 220 mL additional solvent. The solution was cooled in an ice bath and the product filtered to give 126.5 g (89%) of product with the same spectral and physical properties as the sample prepared in Method A.

1. temperatureThe mixture was heated
2. temperatureto reflux
3. distillation300 mL of solvent was distilled
4. additionAcetonitrile (350 mL) and diisopropylethyl amine (0.5 mL) were added
5. distillationthe distillation
6. customto remove 220 mL additional solvent
7. temperatureThe solution was cooled in an ice bath
8. filtrationthe product filtered