A process for the preparation of decahydro-2a,4a,6a,8a-tetraazacyclopentfgacenaphthylene and functionalized derivatives
CA 2406872 C · Owner: Brocchetta, Marino · Inventors: Rebasti, Fabrizio; Ripa, Giorgio; Argese, Maria
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the preparation of compound of formula (IA) decahedra-, 2a,4a,6a,8a-tetraazaccyclopentfgacenaphthylene and the corresponding functionalised compounds of general formula (I) which comprises 2 steps; a) , the preparation of compounds of general formula (III) and b) subsequent reduction thereof. R are both hydrogen or one is hydrogen and the other is a straight or branched C1-C4 alkyl group optionally substituted with one or , more -OPg- protected groups in which Pg is a hydroxy - protecting group. Y1 or Y2 is -CH2-CH2 and the other is -Co-Co- or a group of formula -COCHR wherein R has the meaning defined above.
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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 April 10, 2001 and granted September 6, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 10, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 10, 2023.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.