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:
Nov. 17, 2020
Filed:
Nov. 20, 2017
Applicant:
Basf SE, Ludwigshafen am Rhein, DE;
Inventors:
Bernd Schaefer, Ludwigshafen am Rhein, DE;
Wolfgang Siegel, Ludwigshafen am Rhein, DE;
Assignee:
BASF SE, , DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 403/24 (2006.01); C07C 35/00 (2006.01); C07C 29/00 (2006.01);
U.S. Cl.
CPC ...
C07C 403/24 (2013.01);
Abstract
The invention describes a process for making astacene of formula 1, the exocyclic double bonds thereof having either an E configuration or an E- and/or Z-configuration, wherein astaxanthin of the general formula 2 having asymmetric centers 3 and 3', each of which respectively having an (S)- or (R)-conformation and the exocyclic double bonds of said astaxanthin 2 having either an E- or E- and/or Z configuration, is oxidized in the presence of at least one tertiary alcoholate.