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, 2010
Filed:
Dec. 06, 2004
Werner Bonrath, Freiburg, DE;
Yann Foricher, Riedisheim, FR;
Thomas Netscher, Bad Krozingen, DE;
Angela Wildermann, Bad Säckingen, DE;
Werner Bonrath, Freiburg, DE;
Yann Foricher, Riedisheim, FR;
Thomas Netscher, Bad Krozingen, DE;
Angela Wildermann, Bad Säckingen, DE;
DSM IP Assets B.V. a Netherlands Corporation, Heerlen, NL;
Abstract
The present invention relates to a process for the manufacture of alkenylated aromatic compounds featuring at least one hydroxy group, their ring-closure reactions to 5 chroman derivatives, as well as the acylation of the latter and the aromatic compounds featuring at least one hydroxy group themselves. The present invention relates especially to a process for the manufacture of tocol, tocopherols and their alkanoates such as (x-tocopherol (TCP) and alkanoates (TCPA) thereof, preferably (x-toeopheryl acetate (TCPAc). The processes of the present invention are characterized in that at least one step of the processes is carried out in the presence of an indium salt as the catalyst.