反应详情

1600 mg of (2S,5S)-5-(2-benzylamino-2-carboxyethyl)pyrrolidine-1,2-dicarboxylic acid 1-tert-butyl ester were dissolved in 30 ml of acetic acid. 100 mg of 20% palladium hydroxide on activated carbon were added thereto, and the mixture was hydrogenated under an atmosphere of 1 bar of hydrogen for 1 h. Ar was then passed over the solution for 10 min. The catalyst was filtered off through kieselguhr and the filter cake was washed with 20 ml of acetic acid. The combined organic phases were concentrated in vacuo. The crude product was employed without further purification in the next reaction.

1. filtrationThe catalyst was filtered off through kieselguhr
2. washthe filter cake was washed with 20 ml of acetic acid
3. concentrationThe combined organic phases were concentrated in vacuo
4. customThe crude product was employed without further purification in the next reaction