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. 06, 2012
Filed:
Nov. 21, 2008
Alain Cotte, Leverkusen, DE;
Nikolaus Muller, Wallhausen, DE;
Matthias Gotta, Cologne, DE;
Matthias Beller, Ostseebad Nienhagen, DE;
Thomas Schareina, Cammin, DE;
Alexander Zapf, Rosenheim, DE;
Alain Cotte, Leverkusen, DE;
Nikolaus Muller, Wallhausen, DE;
Matthias Gotta, Cologne, DE;
Matthias Beller, Ostseebad Nienhagen, DE;
Thomas Schareina, Cammin, DE;
Alexander Zapf, Rosenheim, DE;
Saltigo GmbH, Langenfeld, DE;
Abstract
Described is a process for preparing diaryl ethers of the formula (I)Ar—O—Ar'  (I) In which Ar is an aryl or substituted aryl group and Ar′ is an aryl, substituted aryl, heteroaryl or substituted heteroaryl group, by reacting an aryl of formula (II) or a aryloxy salt of formula (III)Ar—OH  (II)Ar—OR  (III) In which Ar has the same meaning as in formula (I) and R is an alkali metal, with an aryl or heteroaryl bromide of formula (IV)Ar′—Br  (IV) In which Ar′ has the same meaning as in formula (I), characterized in that the reaction is carried out in the presence of a copper(I)salt and a 1-substituted imidazole as catalyst system.