Synthesis of olefins from ketones using bis(alkylchloroalumino)methane
CA 1313199 C · Owner: Malpass, Dennis B. · Inventors: Piotrowski, Andrzej M.; Malpass, Dennis B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Ketones are methylenated to form the, corresponding olefin by reaction with a bis(alkylchloroalumino)methane, e.g. in the form of its dietherate. Examples of ketones which can be methylenated include the cycloalkyl ketones multi-ring, ketones, sterically hindered aliphatic ketones and, aromatic ketones. Yields of from 50-90% can be achieved.
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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 26, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 26, 2010.
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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.