反应详情

温度

70 °C

2.0 g (11.7 mmol) of 4-methoxy-3-pyrrolin-2-on-1-yl-acetic acid was dissolved in 15 ml of HCl (1 N) at room temperature and heated to 70° C. with stirring. After 1 hour, 2.04 g of sodium acetate was added to adjust the pH to 2.0. 100 mg of Ru/C was added to the reaction mixture. The reaction mixture was transferred to an autoclave and hydrogenated at 10 bars of H2 pressure with stirring. After 18 hours, the catalyst was filtered off by suction and the filtrate was concentrated by evaporation in a vacuum. The latter yielded 2.9 g of a crude mixture of NaCl and 4-hydroxy-pyrrolidin-2-on-1-yl-acetic acid (42 percent content, 60 percent yield).

1. stirringwith stirring
2. waitAfter 18 hours
3. filtrationthe catalyst was filtered off by suction
4. concentrationthe filtrate was concentrated by evaporation in a vacuum