Asymmetric catalysis
CA 1094094 A · Owner: Monsanto Company · Inventors: Bachman, Gerald L.; Vineyard, Billy D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Catalytic asymmetric hydrogenation of the Z geometric isomer of a compound of the formula, wherein R and R1 each independently represent substituents as desired in the hydrogenation product or its derivatives R2, represents -CN, , or -?-O-R6 wherein R4 and R5 each indepenently represent hydrogen, alkyl having from 1 to 5 carbon atoms or aryl, R6 represents hydrogen, alkyl having from 1 to 5 carbon atoms, aryl or an alkali metal, and R3 represents -?-O-R7 or -?-R8 wherein R7 and R8 each independently represent alkyl having from 1 to 5 carbon atoms or aryl; provided that when R3 is, -?-R8, R2 cannot be -?-O-R6 or in the presence of a, homogenous, coordination complex catalyst comprising …
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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 January 20, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 20, 1998.
- 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
Timeline From CIPO dates
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.