| 摘要 |
-?- HOE 85/F 145 A process for the preparation of aromatic dialkylamines of the formula (1) ( 1 ) in which R denotes an alkyl-C1-C6 group, X and Y each denote a hydrogen, fluorine or chlorine atom or a hydroxyl, alkyl-C1-C4, alkoxy-C1-C4, carboxyl, carbalkoxy-C1-C5, alkyl-C1-C4-CO-NH-, , sulfonic acid, alkyl-C1-C4 sulfonate, sulfamoyl, alkylC1-C4-sulfonyl, hydroxy-alkylene-C1-C4-sulfonyl, phenylsulfonyl, hydroxyphenylsulfonyl, alkyl-C1-C4-phenylsulfonyl or alkoxy-C1-C4-phenylsulfonyl group, wherein compounds of the formula (2) (2) in which R1 denotes a nitro or primary amino group, and X and Y have the mentioned meanings, are reductively dialkylated using at least equimolar amounts of an aldehyde of the formula (3) (3) in which R has the abovementioned mean;ng, in alcohols, alkylbenzenes, glycol ethers, fatty acid dialkylamides or fatty acid aLkyl esters or fatty acid glycol esters, and using catalytically activated hydrogen in the presence of a precious metal catalyst of group 8 of the periodic table, if appropriate in the presence of catalytic amounts of a trialkyl-C1-C6,-amine, at 50.degree.C to 150.degree.C at a pressure of 20 bar to 100 bar. |
