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:
Mar. 31, 2015
Filed:
Jan. 25, 2013
Norbert Hauel, Schemmerhofen, DE;
Rolf Dach, Gau-Algesheim, DE;
Helmut Heitger, Ingelheim am Rhein, DE;
Oliver Meyer, Dorsheim, DE;
Norbert Hauel, Schemmerhofen, DE;
Rolf Dach, Gau-Algesheim, DE;
Helmut Heitger, Ingelheim am Rhein, DE;
Oliver Meyer, Dorsheim, DE;
Boehringer Ingelheim International GmbH, Ingelheim, DE;
Abstract
A process for preparing telmisartan by reacting 2-n-propyl-4-methyl-6-(1'-methylbenzimidazol-2′-yl)benzimidazole with a compound of formula (IV) wherein Z is a leaving group, to obtain the compound 2-cyano-4′-[2″-n-propyl-4″-methyl-6″-(1′″-methylbenzimidazol-2′″-yl)benzimidazol-1″-ylmethyl]biphenyl, and subsequently hydrolyzing the nitrile function to obtain the acid function.