Preparation of derivatives of 6-trifluoromethyl-1,3,5-triazine
CA 2081413 C · Owner: Hamprecht, Gerhard · Inventors: Hamprecht, Gerhard; Mayer, Horst
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
6-Trifluoromethyl-1,3,5triazines I, where R 1 is H and R 1 and R 2 are each a C-organic radical are prepared by reacting a salt of an N-amidino-S-alkylisothiourea II, where R 3 is a C-organic radical of 1 to 10 carbon atoms with a trifluoroacetic acid derivative III and a strong base IV to give a 6-trifluoromethyl-1,3,5-triazine V and reacting the product V in the presence of a base with an alcohol VII, R 2-OH VII. The triazines I are useful intermediates for crop protection agents.
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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
- Filed October 26, 1992 and granted February 25, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 26, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 26, 2014.
- 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.