反应详情

A solution of 4-oxocyclohexaneacetic acid (28.39 g) (Example H) and triethylamine (30.4 ml) in 800 ml of dichloromethane at -10° C. is treated dropwise with isobutyl chloroformate (26.0 ml). The reaction mixture is stirred at this temperature for 15 minutes and 1(S)-phenylethylamine (26.51 g) is added via syringe. After 30 minutes at -10° C., the mixture is stirred at room temperature for another 30 minutes. The reaction is concentrated in vacuo and the residue partitioned between ethyl acetate (1000 ml) and 1 N hydrochloric acid solution (400 ml). The organic extract is washed with 1 N sodium hydroxide solution and brine, dried (magnesium sulfate), and concentrated in vacuo to leave 67.5 g of crude (S)-4-oxo-N-(1-phenylethyl)cyclohexaneacetamide as a white solid; mp 110°-151° C.

1. waitAfter 30 minutes at -10° C.
2. stirringthe mixture is stirred at room temperature for another 30 minutes
3. concentrationThe reaction is concentrated in vacuo
4. customthe residue partitioned between ethyl acetate (1000 ml) and 1 N hydrochloric acid solution (400 ml)
5. extractionThe organic extract
6. washis washed with 1 N sodium hydroxide solution and brine
7. dry with materialdried (magnesium sulfate)
8. concentrationconcentrated in vacuo