反应详情

At room temperature (25° C.), 1.35 g (4.0 mmol) of (3S,4S)-1-carboxymethyl-4-[(1R)-1-(phenylthiocarbonyl)ethyl]-3-[(1R)-1-hydroxyethyl]-2-azetidinone was dissolved in 8 ml of dimethylformamide, and 1.20 (8.0 mmol) of-pivaloyloxymethyl chloride and 1.20 g (8.0 mmol) of sodium iodide were sequentially added thereto. Subsequently, 0.68 g (5.3 mmol) of diisopropylethylamine was added dropwise thereto, and stirring was performed at the same temperature for 6 hours. The reaction solution was diluted with 40 ml of ethyl acetate, and washing was performed several times using 5% aqueous sodium bicarbonate and water. The resulting ethyl acetate solution was dried over sodium sulfate, and then the solvent was removed by distillation. Thereby, 1.88 g of the target compound was produced.

1. washwashing
2. dry with materialThe resulting ethyl acetate solution was dried over sodium sulfate
3. customthe solvent was removed by distillation