反应详情

温度

0 °C

Dissolve 1-methylcyclohexanamine (0.78 g, 6.89 mmol) in anhydrous THF (100 mL) and cool to 0° C. Add Et3N (3.49 g, 34.45 mmol) and 4-chlorobutanoyl chloride (1.94 g, 13.78 mmol) with stirring under N2. Stir the reaction mixture for 2 hours at room temperature and add water (100 mL). Extract the aqueous with EtOAc (3×200 mL) and then combine the organic layers and dry with Na2SO4, filter, concentrate and purify by flash column chromatography (silica gel, 30-80% of EtOAc-Hexane) to give 1.35 g (90%) of 4-chloro-N-(1-methylcyclohexyl)butanamide as a colorless oil.

1. extractionExtract the aqueous with EtOAc (3×200 mL)
2. dry with materialdry with Na2SO4
3. filtrationfilter
4. concentrationconcentrate
5. custompurify by flash column chromatography (silica gel, 30-80% of EtOAc-Hexane)