Process for the preparation of 1-naphtyl-acetic acid derivatives
CA 1100989 A · Owner: Institut De Recherche Scientifique (I.R.S.) · Inventors: Pacheco, Henri; Descours-Saint-Martino, Marie-Ange; Koeberle, Jean
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a process for the preparation of 1-naphthyl acetic acid derivatives having the general formula :, (I), in which : R1 is a hydrogen atom or a straight- or branched-chain C1-6 alkyl group, R2 is a straight- or branched-chain alkyl group or a cycloalkyl group having 1-12 carbon atoms A is a carbonyl or methylene group, R3 is a hydroxy group a C1-6 straight- or, branched-chain alkoxy group or a group of the formula NR4R5 in which R4 and R5 represent independently a hydrogen atom or, C1-6 straight- or branched-chain alkyl group or, together with the nitrogen atom to which they are attached, form a saturated or unsaturated heterocyclic radical, and their pharmaceutically …
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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 12, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 12, 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
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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.