Patent ID: 8304550
Filing Date: 2012-11-06
Classification: C07C,C07D

Abstract:
1. Process for preparing diaryl ethers of the formula (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 an aryloxy salt of formula (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) 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-alkyl-substituted imidazole as catalyst system.