Process for the preparation of benzylidene compounds
CA 1281032 C · Owner: Bayer Aktiengesellschaft · Inventors: Preiss, Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Process for the preparation of benzylidene compounds Abstract, A process for the preparation of a benzylidene compound of the formula, in which, R1 is hydrogen or one or two substituents independently selected from the group consisting of nitro cyano, halogen, SO3H, alkyl, alkoxy and fluorinated alkyl, each with l to 4 C atoms and two or three fluorine substituents and, R3 is alkyl with 1 to 10. C atoms which is, optionally interrupted by an oxygen in the chain or is optionally substituted by fluorine chlorine, hydroxyl or a methylbenzylamine group comprising reacting an acetal of the formula in which, R2 each independently is alkyl with 1 to 6 C atoms which is optionally substituted by …
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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 March 5, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 5, 2008.
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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.