| 摘要 |
Described is a process for preparing diaryl ethers of the formula (I)
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ Ar-O-Ar'€ƒ€ƒ€ƒ€ƒ€ƒ(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)
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ Ar-OH€ƒ€ƒ€ƒ€ƒ€ƒ(II)
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ Ar-OR€ƒ€ƒ€ƒ€ƒ€ƒ(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)
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ Ar'-Br€ƒ€ƒ€ƒ€ƒ€ƒ(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. |
