Process for the preparation of 2,4,6-triiodo-5-amino-n-alkylisophthalamic acid
CA 1331626 C · Owner: Cross, Gregory D. · Inventors: Cross, Gregory D.; Chapman, Robert C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
PROCESS FOR THE PREPARATION OF, 2,4,6-TRIIODO-5-AMINO-N-ALKYLISOPHTHALAMIC ACID Abstract of the Disclosure, An improved process for preparing a compound selected from among 2,4,6-triiodo-5-amino-N-alkylisophthalamic acid salts, thereof and esters thereof. A substrate selected from among 5amino-N-alkylisophthalamic acid, salts thereof and esters thereof is reacted with an iodine halide in an aqueous reaction medium. In accordance with the improvement the substrate and a source of, the iodine halide are added to the reaction medium at such relative rates that, at any instant substantially throughout the addition cycle, the substrate is present in stoichiometric excess over the iodine halide, …
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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 23, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 23, 2011.
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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.