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. 24, 2009
Filed:
Sep. 02, 2004
Werner Bonrath, Freiburg, DE;
Manfred Breuninger, Bad Säckingen, DE;
Grégory Malaisé, Saint-Louis, FR;
Thomas Netscher, Bad Krozingen, DE;
Werner Bonrath, Freiburg, DE;
Manfred Breuninger, Bad Säckingen, DE;
Grégory Malaisé, Saint-Louis, FR;
Thomas Netscher, Bad Krozingen, DE;
DSM IP Assets B.V., Heerlen, NL;
Abstract
The present invention is concerned with a novel process for the manufacture of 4alkanoyloxy-2,3,5-trimethylphenyl (E/Z)-phytyl ethers, precursors of α-tocopheryl alkanoates, by cross-metathesis reaction of alkenyl ethers of 1-alkanoyloxy-2,3,6-trimethylhydroquinone with 2,6,10,14-tetramethylpentadecene or a phytol derivative, e.g. an ester, an ether or a silyl ether, in the presence of a cross-metathesis catalyst. As the crossmetathesis catalyst especially ruthenium metal carbene complexes are suitable which possess (a) ruthenium metal center(s), have an electron count of 16 or 18 and are penta- or hexa-coordinated. A further object of the invention is a process for the manufacture of αtocopheryl alkanoates comprising this reaction.