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:
Jun. 30, 1998
Filed:
Jul. 06, 1995
Walter Dobler, Heidelberg, DE;
Wolfgang Krause, Bruhl, DE;
Joachim Paust, Neuhofen, DE;
Otto Worz, Friedelsheim, DE;
Udo Rheude, Otterstadt, DE;
Wolfram Burst, Mannheim, DE;
Gunter Dauwel, Lustadt, DE;
Armin Bertram, Frankenthal, DE;
Bernhard Schulz, Schwetzingen, DE;
Gunter Wegner, Romerberg, DE;
Peter Munster, Romerberg, DE;
Hansgeorg Ernst, Speyer, DE;
Arno Kochner, Waldsee, DE;
Heinz Etzrodt, Neustadt, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
A process for preparing polyenecarbonyl compounds having a high all-E content and their acetals or ketals by aldol condensation or Horner-Emmons reaction comprises carrying out the reaction, for the purposes of the preferred formation of a double bond of E configuration and in order to maintain the E configuration of the double bonds in the stating compounds as completely as possible, in the presence of oxygen or an oxygen-inert gas mixture or nitric oxide or a nitric oxide-inert gas mixture and/or in the presence of specific stable radicals and/or in the presence of quinones or quinone derivatives.