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:
Jul. 10, 2018
Filed:
Jul. 31, 2015
Applicant:
Basf SE, Ludwigshafen, DE;
Inventors:
Bernd Schäfer, Dierbach, DE;
Wolfgang Siegel, Limburgerhof, DE;
Assignee:
BASF SE, Ludwigshafen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 403/24 (2006.01); C07C 403/08 (2006.01);
U.S. Cl.
CPC ...
C07C 403/24 (2013.01); C07C 403/08 (2013.01); C07B 2200/07 (2013.01); C07C 2601/16 (2017.05);
Abstract
The invention relates to a method for preparing a cyclic α-ketoalcohol, particularly a 6-hydroxycyclohexenone from a cyclic α-ketoenol, particularly a 6-hydroxycyclohexadienone, using a reducing agent. This reducing agent is selected from hydrogen gas; a secondary alcohol, formic acid and the salts of formic acid or a mixture of at least two representatives of these compound classes. The invention further comprises the use of an α-ketoenol, in particular a 6-hydroxycyclohexadienone, as intermediate for preparing astaxanthin.