| 摘要 |
Colour formers of the formula …<IMAGE>… in which… X denotes hydroxyl, alkoxy, alkenyloxy, aralkoxy, cycloalkoxy, aryloxy, acyloxy, alkoxycarbonyloxy, alkylamino, dialkylamino, acylamino, aralkylamino or arylamino,… Q denotes cyano, alkoxycarbonyl, aryloxycarbonyl, aralkoxycarbonyl, carbamoyl, N-alkylcarbamoyl, N,N-dialkylcarbamoyl, N-alkyl-N-arylcarbamoyl, acyl, alkoxysulphonyl, aralkoxysulphonyl, sulphamoyl, N-alkylsulphamoyl, N,N-dialkylsulphamoyl, alkylsulphonyl, arylsulphonyl or aralkylsulphonyl and… R denotes alkyl, alkenyl or aralkyl,… further isocyclic or heterocyclic rings can be fused to the rings A, B, C and D, and the cyclic and acyclic radicals and the rings A, B, C and D can carry further substituents,… are used for the preparation of pressure-sensitive recording materials. |
