Process for preparing n-1(s)-ethoxycarbonyl-3- phenylpropyl-l-alanyl-l-proline
CA 1329445 C · Owner: Yanagida, Yoshifumi · Inventors: Yanagida, Yoshifumi; Takahashi, Satomi; Inoue, Kenji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for preparing N-1(S)-ethoxycarbonyl- 3-phenylpropyl-L-alanyl-L-proline, which comprises reacting N-carboxyanhydride of N-1(S)-ethoxycarbonyl- 3-phenylpropyl-L-alanine with L-proline in the presence of a base. According to the process, enalapril can be prepared economically, easily and effectively.
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted May 10, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 10, 2011.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.