Process for preparing 3-amino-1-benzylpyrrolidines
CA 1331623 C · Owner: Bayer Aktiengesellschaft · Inventors: Schenke, Thomas; Krebs, Andreas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Process for preparing 3-amino-1-benzylpyrrolidines ABSTRACT OF THE DISCLOSURE, A process for preparing a 3-amino-1-benzylpyrrolidino of the formula, (I), in which R1 and R2 each independently is H or alkyl and, Ph is phenyl, comprising reacting a 1-benzyl-.DELTA.3-pyrroline-2,5-dione of the formula, (II), in which, R3 and R4 each independently is H or alkyl with a nitrogen nucleophile of the formula R5NH2 (III), in which, R5 is H, benzyl naphthylmethyl or phenyl-CHR6, and, R6 is C1-C6-alkyl or phenyl to give an optionally substituted 3-amino-1-benzylpyrrolidine 2,5-dione of the formula, (IV), and if R5 ? H, the protecting group R5 is subsequently cleaved off to give a …
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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 August 23, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 23, 2011.
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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.