Intermediates in preparation of new phenylethanolaminomethyltetralins
CA 2222657 C · Owner: Sanofi · Inventors: Guzzi, Umberto; Cecchi, Roberto
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Intermediate of the formula (X) (see fig.I), wherein Z is -OH or -HN2 and G" represents hydrogen chloro, hydroxy or methoxy, provided that when Z is -OH G" is not, hydrogen, are employed in the manufacture of new phenylethanolaminomethyltetralins of formula (I) (see fig.II), wherein, - E represents hydrogen (C1-C4) alkyl, (C1-C4) alkoxy, phenyl, nitro halogen or trifluoromethyl, - L represents hydrogen (C1-C4) alkyl, (C1-C4) alkoxy, phenyl, nitro or halogen, or, - E and L taken together represent a group -CH=CH-CH=CH- or - CH2-CH2-CH2-CH2, and, - G represent hydrogen chloro hydroxy or an -OG' group, wherein G' represents a (C1-C4) alkyl group either unsubstituted or substituted with hydroxy …
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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 December 27, 1990 and granted October 23, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 27, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 27, 2012.
- 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.