反应详情

A solution of N-[1-(S)-ethoxycarbonyl-1-butyl]-(S)-alanine benzyl ester (14.5 g, as obtained in Step-I) in ethanol (150 ml) was hydrogenated in the presence of 10% palladised charcoal (0.8 g) under 40-45 psi hydrogen pressure for 1.5 to 2 hrs. The reaction mixture was concentrated under reduced pressure to give an oil. Crystallization from a mixture of acetonitrile and ethanol (1:3) gave 6.1 g the title compound

1. concentrationThe reaction mixture was concentrated under reduced pressure
2. customto give an oil
3. customCrystallization
4. additionfrom a mixture of acetonitrile and ethanol (1:3)