The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 13, 1976
Filed:
Jun. 25, 1975
Applicant:
Inventor:
Armand Amselem, Toulouse, FR;
Assignee:
Parcor, Paris, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
2602 / ; 2603 / ;
Abstract
The present invention relates to a process for the preparation of thieno[3,2-c]pyridine or thieno[2,3-c]pyridine, comprising cyclizing a N-(3-thienyl)-methyl-N-[ 2,2-(OR).sub.2 ]ethyl-para-toluene sulfonamide or a N-(2-thienyl)-methyl-N-[2,2-(OR).sub.2 ]ethyl-para-toluene sulfonamide, respectively, in which R is lower alkyl or both R groups form together a 2- or 3-membered alkylene radical, by treatment with an acid in the presence of an inert organic solvent.
Amselem, Armand. (1976). Process for the preparation of thieno [3,2-c] pyridine and thieno [2,3-c] p (U.S. Patent No. 3969358). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/3969358
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile