Method of producing nitrogen-containing heteroaromatic compounds having an alkoxy group
CA 1318320 C · Owner: Kato, Masayasu · Inventors: Kato, Masayasu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Nitrogen-containing heteroaromatic compounds having an alkoxy group of the formula:, Het-OR (III) (wherein Het is a nitrogen-containing heteroaromatic ring such as pyridine ring which may be substituted and in which the nitrogen atom may be oxidized and R is alkyl halogenated alkyl, aryl or aralkyl) are produced by reacting nitrogen-containing heteroaromatic compounds having a nitro group of the formula: Het-NO2 (I), (wherein Het is as defined above) with alcohol or alcoholate of the formula:, ROM (II), (wherein R is as defined above and M is hydrogen or alkali metal) in the presence of a phase transfer catalyst and a base.
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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 25, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 25, 2010.
- 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.