Process for preparing alkyl-L-alanyl-L-proline derivatives

摘要

A process for preparing N-[1(S)-ethoxycarbonyl-3-phenylpropyl]-L-alanine N-carboxy anhydride from N-[1(S)-ethoxycarbonyl-3 -phenylpropyl]-L-alanine and N,N'-carbonyldiimidazole and the condensation thereof with L-proline silyl ester hydrochloride. The condensation product is used as an angiotensin converting enzyme (ACE) inhibitor.