2,3,4,5-tetrahydro-1-benzoxepin-3,5-dione derivatives
CA 1159840 A · Owner: Kali-Chemie Pharma G.M.B.H. · Inventors: Wolf, Klaus-Ullrich; Kaupmann, Wilhelm; Heinemann, Henning
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides 2,3,4,5-tetrahydro-1benzoxepin-3,5-dione derivatives of the following Formula II II, wherein R3 and R4 independently of one another are halogen C1-C4, alkyl, C1-C4 alkoxy, C1-C4 alkylthio or one of R3 and R4 are halogen, C1-C4 alkyl, C1-C4 alkoxy, C1-C4 alkylthio trifluoro-, methyl or nitro and the other is hydrogen with the proviso that, R3 is not bromine when R4 is methyl which are intermediates in, the preparation of 3-amino-1-benzoxepin-5(2H)-one derivatives corresponding to the Formula I:, I, wherein: R1 and R2 independently of one another are hydrogen C1-C5 alkyl, C1-C5 alkyl substituted with a terminal phenyl or, a phenyl containing one or two halogens …
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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 January 3, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 3, 2001.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.