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. 13, 2021
Filed:
Jan. 25, 2017
Applicant:
Basf SE, Ludwigshafen, DE;
Inventors:
Eric George Klauber, Huntsville, AL (US);
Michael Rack, Ludwigshafen, DE;
Sebastian Soergel, Limburgerhof, DE;
Birgit Gockel, Ludwigshafen, DE;
Roland Goetz, Ludwigshafen, DE;
Assignee:
BASF SE, Ludwigshafen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 231/14 (2006.01); C07C 251/76 (2006.01); C07D 401/12 (2006.01); B01J 21/18 (2006.01); B01J 23/42 (2006.01); C07C 249/16 (2006.01); C07D 403/12 (2006.01);
U.S. Cl.
CPC ...
C07D 231/14 (2013.01); B01J 21/18 (2013.01); B01J 23/42 (2013.01); C07C 249/16 (2013.01); C07D 401/12 (2013.01); C07D 403/12 (2013.01);
Abstract
The present invention relates to a catalytic process for preparing pyrazoles of formula V comprising the step of cyclizing hydrazone substituted α,β-unsaturated carbonyl compounds by reacting them with hydrogen in a reaction mixture comprising as components (a) a hydrogenation catalyst, (b) an acid selected from Brønsted acids, ammonium salts of Brønsted acids, and Lewis acids, (c) a protic solvent, and optionally (d) an aprotic solvent.