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.
描述了一种制备化合物(I)Ar—O—Ar'的过程,其中Ar是芳基或取代芳基基团,Ar'是芳基、取代芳基、杂环芳基或取代杂环芳基基团,通过将式(II)的芳基或式(III)的芳氧盐Ar—OH或Ar—OR(其中Ar与式(I)中相同,R为碱
金属)与式(IV)的芳基或杂环芳基
溴化物Ar'—Br(其中Ar'与式(I)中相同)反应,其特征在于在
铜(I)盐和1-取代
咪唑作为催化剂体系的存在下进行反应。