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:
Aug. 07, 1979
Filed:
Dec. 13, 1977
Gerard Ferrand, Toulouse, FR;
Jean-Pierre Maffrand, Toulouse, FR;
Parcor, Paris, FR;
Abstract
This invention relates to a process for the preparation of tetrahydro-thieno[3,2-c]pyridine derivatives of the formula ##STR1## AND THEIR ISOMERIC TETRAHYDRO-THIENO[2,3-C]PYRIDINE DERIVATIVES IN WHICH R.sub.1 represents hydrogen, a lower alkyl or alkoxy radical, an aryl radical or an aralkyl radical; R.sub.2 and R.sub.3 represent hydrogen, halogen, a lower alkyl or alkoxy group, a di(loweralkyl)amino, nitro, cyano or acetamido group or, together with the phenyl nucleus to which they are attached, form a polycyclic aromatic ring, comprising reacting a tetrahydrothieno[3,2-c]pyridine derivative of the formula: ##STR2## OR A DERIVATIVE OF ITS ISOMER, TETRAHYDRO[2,3-C]PYRIDINE, WITH FORMALDEHYDE H-CHO and a phenol of the formula: ##STR3##