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:
Apr. 23, 1996
Filed:
Feb. 23, 1994
Applicant:
Inventors:
Erwin Dietz, Kelkheim/Ts., DE;
Gustav Kapaun, Bad Soden, DE;
Assignee:
Hoechst AG, , DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
5483097 ;
Abstract
Process for the preparation of substituted and unsubstituted 2-(cyanomethyl)benzimidazole A process for the preparation of substituted or unsubstituted 2-(cyanomethyl)benzimidazole, of the formula (I) ##STR1## which comprises reacting an o-phenylenediamine of the formula (II) ##STR2## in which R.sup.1 is C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.4 -alkoxy, preferably methyl or methoxy, and n is an integer from 0 to 2, preferably 0 or 1, in particular 0, with a cyanoacetic ester of the formula (III)