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. 25, 2000
Filed:
Jul. 17, 1998
Applicant:
Inventors:
Michael Conrad, Wuppertal, DE;
Lutz Assmann, Peter-Ording, DE;
Heinz-Jurgen Wroblowsky, Langenfeld, DE;
Carl Casser, Koln, DE;
Dietmar Bielefeldt, Ratingen, DE;
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DE;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ; C07D / ;
U.S. Cl.
CPC ...
5483021 ;
Abstract
A novel process for the preparation of 2-chloro-benzimidazole derivatives of the formula ##STR1## in which A represents optionally halogenated alkylene having 1 or 2 carbon atoms, which process comprises reaction 1,3-dihydro-benzimidazol(ethi)ones of the formula ##STR2## in which X represents oxygen or sulphur, with phosphorus oxychloride. Novel 1,3-dihydro-benzimidazol(ethi)ones of the formula(II) and process for their preparation.