Process for preparing aniline compounds
CA 1113963 A · Owner: Ethyl Corporation · Inventors: Walter, Thomas J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved process is provided for the production of thioalkyl aniline compounds, which are known and useful as intermediates for producing anthelmintic antibacterial, and fungicidal benzimidazole compounds. According to the process a thiocyano aniline compound, an alcohol and an alkali metal cyanide are reacted, with the additional presence of an alkyl halide, and also with a dipolar aprotic solvent, or in the presence of an immiscible solvent and a phase transfer catalyst. A further improvement consists of providing said phase transfer catalyst as a polymer-bound catalyst.
Read the whole patent
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 December 8, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 8, 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.