| 主权项 |
1. A method for preparing compounds of the formula (I)in which
n is 0, 1, 2 or 3, preferably 1 or 2, particularly preferably 1 the residues R1 are each independently a halogen atom, preferably chlorine or bromine, more preferably chlorine, which is bonded to the aromatic ring the residues R2 are each independently C1-C8-alkyl, C6-C12-aryl or C7-C13-arylalkyl or both residues R2 together are a straight-chain or branched C3-C12-alkylene residue, which may optionally be interspersed by one or more oxygen atomsby reacting compounds of the formula (II)with compounds of the formula (III)
HN(R2)2 (III)where the residues R1, R2 and R3 in the formulae (I) and (II) have the meanings stated under the formula (I) and
X is chlorine, bromine, iodine, —OSO2-(C1-C6-alkyl) or —OSO2-(C1-C6-perfluoroalkyl), preferably chlorine or bromine, especially preferably chlorinewherein the method is characterized in that
the molar ratio of compounds of the formula (III) to compounds of the formula (II) is 3:1 or greater, preferably 3:1 to 50:1, particularly preferably 3:1 to 20:1 and especially preferably 5:1 to 20:1 and also in another embodiment 5:1 or greater, preferably 5:1 to 50:1, particularly preferably 5:1 to 20:1 and especially preferably 8:1 to 14:1 organic solvent is used in an amount of 10% by weight or less, preferably 5% by weight or less, particularly preferably 0 to 2% by weight, based on the sum of compounds of the formulae (II) and (III) used and especially preferably no organic solvent is used and water is used, preferably more than 10% by weight, particularly preferably more than 30% by weight, especially preferably more than 50% by weight and particularly preferably more than 100% by weight of water, especially preferably 100 to 1000% by weight, based on the compound of the formula (II) used. |
