Process for the preparation of thieno (3, 2-c) pyridine and derivatives thereof
CA 1071631 A · Owner: Parcor · Inventors: Heymes, Alain; Maffrand, Jean-Pierre
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 THIENO (3,2-C) PYRIDINE AND DERIVATIVES THEREOF, ABSTRACT OF THE DISCLOSURE This invention relates to a process for the preparation of compounds having the formula:, (I), in which R1 is H or lower alkyl and R2 is H or lower alkyl,or phenyl or benzyl optionally substituted with at least one halogen or a lower alkyl, lower alkoxy, trifluoromethyl or nitro group. According to this method a compound of the formula:, (II), in which R1 and R2 are as defined above and R3 is H optionally substituted alkyl or benzyl, is reacted with a derivative Hal-SO2-R (III) in which Hal is halogen and R is optionally substituted alkyl, aryl or aralkyl, to give a derivative of the …
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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 February 12, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 12, 1997.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.