反应详情

温度

25 °C

In a flask was placed (S)-2-[4-(2-chloro-phenoxy)-2-oxo-2,5-dihydro-pyrrol-1-yl]-4-methoxy-butyric acid methyl ester (71 mg, 0.21 mmol) in tetrahydrofuran (3 mL). To this mixture at 25° C. was added a solution of lithium hydroxide monohydrate (18 mg, 0.42 mmol) in water (3 mL) and stirred for 1.5 h at 25° C. The mixture was then treated with a 1N aqueous hydrochloric acid solution to pH=2 and extracted with ethyl acetate (3×20 mL). The combined organic layers were dried over magnesium sulfate, filtered and concentrated in vacuo to afford (S)-2-[4-(2-chloro-phenoxy)-2-oxo-2,5-dihydro-pyrrol-1-yl]-4-methoxy-butyric acid (32 mg, 98%) as a light yellow solid.

1. customIn a flask was placed
2. extractionextracted with ethyl acetate (3×20 mL)
3. dry with materialThe combined organic layers were dried over magnesium sulfate
4. filtrationfiltered
5. concentrationconcentrated in vacuo