Process for the preparation of hydrazidines
CA 1189532 A · Owner: Bayer Aktiengesellschaft · Inventors: Bonse, Gerhard; Schmidt, Thomas
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 hydrazidines A one-step process for the preparation of hydrazidines of the general formula, (I), in which, R represents an optionally substituted alkyl group, an optionally substituted cycloalkyl group, an optionally sub-, stituted aryl group or an optionally substituted aralkyl group, or their acid addition salts in high yield, comprises, reacting appropriate amidines or their acid addition salts with hydrazine hydrate (NH2-NH2 x H2O) in technical solvents at reduced pressure and at temperatures between -80°C and +100°C. The hydrazidines of formula (I) and their salts are valuable intermediates in heterocyclic chemistry for, example for the synthesis of …
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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 25, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 25, 2002.
- 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
Timeline From CIPO dates
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.