Anthelmintic benzimidazol-carbamates
CA 1104142 A · Owner: Montedison S.P.A. · Inventors: Da Col, Lino; Piccardi, Paolo; Ramella, Pier G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for preparing new benzimidazol-(2)-methyl-carbamates substituted in the 5(6) position and having the general formula (I):, wherein:, x=s or SO; and n=0; 1; or 2, which comprises reducing 2-nitro 4-thiocyanoaniline with sodium borohydride in dimethylformamide to obtain the alkaline mercaptate of orthonitro-aniline; adding to the so-obtained mercaptate, a halide of the general formula: X - CH2-(CH2-CH2)n - CH=CCl2, in which x is halogen and n is 0; 1; or 2; to obtain 4 ?.omega..omega.dihaloalkyl-(.omega.-1)-en-1-yl)-thio? -orthonitroaniline in which .omega. is 3,5 or 7; reducting the so-obtained product with hydrosulfite to obtain the corresponding phenylenediamine; reacting the …
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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 June 30, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 30, 1998.
- 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.