主权项 |
1. A process for preparing aromatic amines of the general formula (I)
Ar—NR1R2 (I)where
Ar is a substituted or unsubstituted aryl, heteroaryl, arylalkyl, heteroarylalkyl radical, R1 and R2 can be identical or different and are each H, a hydrocarbon group, heteroatom-containing hydrocarbon group which may have suitable substituents, and the radicals R1 and R2 may form a ring which can be 4- to 20-membered, saturated or unsaturated, alicyclic or heteroalicyclic and may have suitable substituents, said process comprising reacting an aromatic compound having the general formula II
Ar—X (II)where
Ar is as defined above and X is F, Cl, Br, I or OSO2R3 in which R3 is a hydrocarbon group, in the presence of a catalyst with an amine of the general formula III
H—NR1R2 (III) where R1 and R2 are as defined above, and a base, wherein the catalyst is selected from among transition metal complexes which have one or more ligands having the general formula IVwhere
R3, R4, R5 and R6 can be identical or different and are each H, a linear or branched C1-C6-alkyl radical which may optionally be substituted or R3 and R4 and/or R5 and R6 are joined to one another to form a ring, Y is halogen or an —OR7 radical, where R7 is H or a linear or branched C1-C6-alkyl chain which may optionally be substituted or an aryl radical which may optionally be substituted. |