反应详情

To a mixture of 2,2-dimethylmalonic acid t-butyl ester cyclohexyl ester (817 mg) and dichloromethane (7.5 mL), TFA (1.5 mL) was added, and the resulting mixture was stirred at room temperature for 2.5 hours. To the resulting mixture, ethyl acetate (100 mL) was added. The resulting mixture was sequentially washed with water (30 mL) and saturated aqueous sodium chloride solution (30 mL), and dried over anhydrous magnesium sulfate. The resulting mixture was filtered, and toluene (10 mL) was added to the filtrate obtained, after which the filtrate was concentrated under reduced pressure to obtain the captioned compound (571 mg).

1. additionwas added
2. washThe resulting mixture was sequentially washed with water (30 mL) and saturated aqueous sodium chloride solution (30 mL)
3. dry with materialdried over anhydrous magnesium sulfate
4. filtrationThe resulting mixture was filtered
5. additiontoluene (10 mL) was added to the filtrate
6. customobtained
7. concentrationafter which the filtrate was concentrated under reduced pressure