| 摘要 |
<p>of the disclosure: Compounds of the general formula I A - B - A (I) where A is a radical of the formula and B is a bridge member of the formula .THETA.A and where R1 and R2 independently of one another are unsubstituted or hydroxy-, C1-C4-alkoxy-, cyano-, C1-C4-alkoxycarbonyl-, di-C1-C4-alkylamino-, chlorine- or bromine-substituted C1-C4-alkyl, cyclohexyl, benzyl, phenylethyl or phenyl, or R1 and R2 together with the nitrogen are morpholino, pyrrolidino, piperidino or N-methylpiperazino, R3 is hydrogen, chlorine, bromine, methyl, ethyl, methoxy, ethoxy or nitro, R4 and R5 independently of one another are hydrogen, C1-C4-alkyl or benzyl, X is oxygen or imino and alkylene is of 2 to 6 carbon atoms and is linear or branched. The compounds of the formula I are particularly suitable for coloring paper pulps.</p> |
