1,1'-Biphenyl, mixt. with 1,1'-oxybis(benzene) → Quinacridone
Reaktionsgleichung
[NH:1]([C:8]1[CH2:17][C:16]([C:18]([O:20]C)=O)=[C:15]([NH:22][C:23]2[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=2)[CH2:14][C:9]=1[C:10]([O:12]C)=O)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.C1C=CC(C2C=CC=CC=2)=CC=1.C1C=CC(OC2C=CC=CC=2)=CC=1>>[CH:26]1[CH:27]=[C:28]2[C:18]([C:16]3[C:15]([NH:22][C:23]2=[CH:24][CH:25]=1)=[CH:14][C:9]1[C:10]([C:7]2[C:2]([NH:1][C:8]=1[CH:17]=3)=[CH:3][CH:4]=[CH:5][CH:6]=2)=[O:12])=[O:20]Komponenten
3
Reaktionsbedingungen
- Temperatur
- 140 °C
Versuchsvorschrift
(b.1) A suspension of 37.8 parts of dimethyl 3,6-dihydro-2,5-dianilinoterephthalate in 200 parts of ®Dowtherm A is added dropwise to 150 parts of boiling ®Dowtherm A. The mixture is then kept at the boil for a further 90 minutes. After approx. 100 parts of the solvent have been distilled off, the mixture is cooled to approx. 140° C., after which 25.4 parts of iodine are added and the mixture is kept at the boil for a further 4 hours. Working up is effected as described earlier in the text under "Method A". 27.8 parts of quinacridone in the β-crystal phase are obtained, which corresponds to a yield of 89% of theory (relative to dimethyl 3,6-dihydro-2,5-dianilinoterephthalate.