Method to prepare chlorinated derivatives of pyridine compounds and the use of bis (trichloromethyl) sulfone in this method
CA 1340983 C · Owner: Janssens, Francine · Inventors: Franklin, James; Janssens, Francine
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a process for the preparation of chlorinated derivatives of pyridine compounds by a chlorination reaction of the corresponding pyridine compounds with molecular chlorine, carried out in the gaseous phase by means of bis(trichloromethyl)sulfone as a free radical initiator. The obtained chlorinated derivatives of pyridine compounds such as 2,6-dichloropyridine, can be used as chemical intermediates.
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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 May 2, 2000. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 2, 2017.
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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.