反应详情

A solution of 916 mg of (3R,5S)-3-ethyl-5-[(S)-1-(2-nitrobenzenesulfonyl)aziridin-2-yl]dihydrofuran-2-one obtained in Example (106g) (2.69 mmol) and 771 mg of 1-(2-chlorophenyl)-5,5-dimethylpiperazin-2-one obtained in Example (1k) (3.23 mmol) in toluene (27 ml) was stirred at 110° C. for two hours. After cooling, the reaction mixture was concentrated under reduced pressure, and the residue was purified by silica gel column chromatography (elution solvent:methylene chloride/ethyl acetate=3/1-2/1) to obtain 1.49 g of the title compound (yield: 96%).

1. temperatureAfter cooling
2. concentrationthe reaction mixture was concentrated under reduced pressure
3. customthe residue was purified by silica gel column chromatography (elution solvent:methylene chloride/ethyl acetate=3/1-2/1)