Process for the monoacylation of aminohydroxynaphthalenesulphonic acids with 2,4,6- trifluoro-s-triazine
CA 1085394 A · Owner: Ciba-Geigy Ag · Inventors: Seiler, Herbert; Bonometti, Emil
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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PROCESS FOR THE MONOACYLATION OF AMINOHYDROXYNAPHTHALENE- SULPHONIC ACIDS WITH 2,4,6-TRIFLUORO-S-TRIAZINE Abstract of the Disclosure, Process for producing compounds of the formula (1), wherein R is hydrogen, methyl or ethyl and n is 1 or 2, which process comprises condensing aminohydroxynaphthalenesulphonic acids of the formula, (2), with 2,4,6-trifluoro-s-triazine in an aqueous solution or, suspension, within a pH range which is defined by PKN(R)H ? pH ? (pKOH - 2), wherein PKN(R)H and pKOH are the pK values respectively of the amino group and hydroxyl group of the aminohydroxynaphthalenesulphonic acid and pH is the hydrogen exponent to give compounds, of the formula (1).
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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 September 9, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 9, 1997.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.