Process for the preparation of 2,4-diamino-5-(3',4', 5'-trimethoxybenzyl)pyrimidine
CA 1164458 A · Owner: Egyt Gyogyszervegyeszeti Gyar · Inventors: Beck, Ivan; Jakfalvi, Elemer; Takacs, Zoltan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a novel process for the preparation of 2,4-diamino-5-/3',4',5'-trimethoxybenzyl/pyrimidine of the formula I, /I/, through the reaction of an alpha-/3 ,4 ,5 -trimethoxybenzyl/- -beta-/substituted/-acrylonitrile with guanidine. According to the invention an alpha-/3 ,4 ,5 -trimethoxybenzal/-beta-methoxypropionitrile of the formula III /III/, is reacted with a diethylene glycol monoalkyl ether of the formula IV, HO-CH2CH2-O-CH2CH2-OR /IV/ wherein R is an alkyl group having 1 to 4 carbon atoms at, 60 to 90 °C in the presence of an alkali metal alkoxide and, the obtained benzyl isomer of the formula II - 2 -, /II/, wherein R is as stated above is reacted - optionally …
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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 March 27, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 27, 2001.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.