Substituted indoline-2-one derivatives
CA 1161848 A · Owner: Imperial Chemical Industries Limited · Inventors: Brittain, David R.; Wood, Robin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns novel 1'-substituted spiroimidazolidine-4,3'-indoline -2,2',5-triones of the formula:-, I, in which R1 is (1-12C)alkyl; phenyl naphthylmethyl or, cinnamyl optionally bearing 1-2 halogeno substituents; or benzyl optionally bearing 1-3 substituents independently selected from halogeno, trifluoromethyl (1-4C)-, alkyl, (1-4C)alkoxy, nitro, cyano and hydroxy; and. ring A optionally bears one slubstituent selected from halogeno, (1-4C)alkyl, (1-4C)alkoxy, nitro and hydroxy or two substituents independently selected from halogeno (1-4C)alkyl and nitro; or a pharmaceutically acceptable salt thereof;but excluding those compounds wherein R1 is methyl,ethyl, n-propyl or …
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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 February 7, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 7, 2001.
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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.