申请人:Hoechst Aktiengesellschaft
公开号:US04124768A1
公开(公告)日:1978-11-07
2,5-Diarylamino terephthalates are obtained in good yields and excellent purity when the aromatic nitro compound used for oxidizing the corresponding dihydro-2,5-diarylamino terephthalate contains the aromatic radical of said diarylamino groups, i.e. when the amine formed during the oxidation is that from which said diarylamino groups device. The products yield very pure quinacridone pigments and allow the synthesis of only one isomer of substituted quinacridones.
当用含有所述二芳基氨基基团的芳香硝基化合物氧化相应的二氢-2,5-二芳基氨基苯甲酸酯时,可以获得良好的产率和极高的纯度,即在氧化过程中形成的胺基是来自所述二芳基氨基基团的胺基。该产品产率非常纯净的喹诺酮颜料,并且只允许合成取代喹诺酮的一个异构体。