PROCESS FOR RESOLUTION AND RACEMIZATION OF AMINES WITH ACIDIC .alpha.-HYDROGENS
CA 1310316 C · Owner: Merck & Co. Inc. · Inventors: Grabowski, Edward J.J.; Reider, Paul J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
41660/1200A, 17383, TITLE OF THE INVENTION PROCESS FOR RESOLUTION AND RACEMIZATION OF AMINES WITH ACIDIC .alpha.-HYDROGENS, ABSTRACT OF THE INVENTION An economical, one-pot process for, resolution-racemization of primary amines with .alpha.-hydrogens via selective crystallization of diastereomeric chiral sulfonic acid salts and the subsequent in situ racemization of the other enantiomer by the catalytic addition of aromatic aldehydes, and a key process intermediate thereof.
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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 November 17, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 17, 2009.
- 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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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.