Process for preparing o-alkyl s-(alpha-branched alkyl) alkylphosphonothioates
CA 1258077 A · Owner: Rhone-Poulenc Agrochimie · Inventors: Brochard, Jean-Michel; Gough, Stanley T. D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Process for preparing an O-alkyl S-(alpha-branched alkyl) alkylphosohonothioate of the formula:, wherein R and R1 are alkyl of 1 to 8 carbon atoms and R2 is alpha-branched alkyl of 3 to 8 carbon atoms which comprises reacting an O-(alkylalkylphosphonic acid halide with an alkyl mercaptan HSR2 in an organic medium, in the presence of an acid acceptor and a smaller amount of an auxiliary base.
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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 August 1, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 1, 2006.
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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.