Derivatives of 6-(m-aminophenyl)-2,3,5,6- tetrahydroimidazo¬2,1-b thiazoles
CA 1088546 A · Owner: Pfizer Corporation · Inventors: Stubbs, John K.; Leeming, Michael R.G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The 1- and d1-(racomic) forms of the compounds of the formula:, ...(I), wherein R is H or CH3 and the non-toxic acid addition salts, thereof useful as antihelmintic compounds are disclosed. The compounds may be prepared by reacting 1- or d1- 6-(m-aminophenyl)-2,3,5,6-tetrahydroimidazo2,1-bthiazole with an acid of the formula:, ...(III), wherein R is H or CH3 or with its functional equivalent as an acylating agent, and if desired, when the d1- form of the thiazole starting material is used, resolving the d1- product so as to obtain the 1- form, and if desired, converting an 1- or d1- form of a compound of the Formula (I), into a non-toxic addition salt by reaction with a suitable acid.
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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 October 28, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 28, 1997.
- 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.