反应详情

To a suspension of sodium hydride (2.30 g) in absolute dioxane (100 ml) was added dropwise ethyl 3-methyl-2-oxo-4-pyrrolidinecarboxylate (13.68 g) with stirring at room temperature. After stirring for 30 minutes, to a reaction mixture was added benzylbromide (16.42 g) during 20 minutes, then stirred for 2 hours and allowed to stand overnight at room temperature. The reaction mixture was poured into ice-water (100 ml) and extracted with chloroform, washed with water, dried over anhydrous sodium sulfate and concentrated. The residue was purified by vacuum distillation to give ethyl 1-benzyl-3-methyl-2-oxo-4-pyrrolidinecarboxylate (16.86 g), bp 155°-185° C./2 mmHg.

1. stirringAfter stirring for 30 minutes, to a reaction mixture
2. stirringstirred for 2 hours
3. extractionextracted with chloroform
4. washwashed with water
5. dry with materialdried over anhydrous sodium sulfate
6. concentrationconcentrated
7. distillationThe residue was purified by vacuum distillation