反应详情

温度

57.5 °C

A mixture of 1-(4-isopropyl-phenyl)-5-oxo-pyrrolidine-3-carboxylic acid obtained in step 1 (0.6 g, 2.42 mmol), thionyl chloride (0.35 g, 2.90 mmol), and ethanol (10 ml) was heated at 55-60° C. for 2 hours. The mixture was cooled and solvent was removed. The residue was dissolved in ethyl acetate (20 ml). The organic layer was washed with saturated NaHCO3 and saturated brine solution (20 ml). The organic layer was dried over Na2SO4 and evaporated to obtain 1-(4-isopropyl-phenyl)-5-oxo-pyrrolidine-3-carboxylic acid ethyl ester as yellow oil (0.7 g, 100%).

1. temperatureThe mixture was cooled
2. customsolvent was removed
3. dissolutionThe residue was dissolved in ethyl acetate (20 ml)
4. washThe organic layer was washed with saturated NaHCO3 and saturated brine solution (20 ml)
5. dry with materialThe organic layer was dried over Na2SO4
6. customevaporated