Process for the preparation of 3-carboxy-1,4- dimethylpyrrol-2-acetic acid
CA 1190935 A · Owner: Montedison S.P.A. · Inventors: Carletti, Vittorio; Campolmi, Stefano; Marchi, Marcello
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
PROCESS FOR THE PREPARATION OF 3-CARBOXY-1.4- DIMETHYLPYRROL-2-ACETIC ACID, ABSTRACT OF THE INVENTION There is described a process for the preparation of 3-carboxy-1,4-dimethylpyrrol-2-acetic acid of formula (I): characterized in that a carboxylic compound selected from the group consisting of acetone-bicarboxylic acid and its alkaline salts is made to react in an aqueous medium with methylamine and a halo-acetone at substantially room temperature. The product represents an intermediate for organical syntheses. In particular it is intended for the preparation of 5-aryloyl-pyrrol-alkanoic acids, known antiinflammatory agents in the pharmaceutical field.
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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 July 23, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 23, 2002.
- 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
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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.