1,4-Cyclohexadiene-1,4-dicarboxylic acid, 2,5-bis(phenylamino)-, 1,4-dimethyl ester → Quinacridone

HRID 1032007

Reaction equation

HRID 1032007 reaction equation
[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>O>[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]

Participants

3

Reactant 1

HCID 786101,4-Cyclohexadiene-1,4-dicarboxylic acid, 2,5-bis(phenylamino)-, 1,4-dimethyl ester

Product 1

HCID 13976QuinacridoneYield 90.9%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

A suspension of 400 g of dimethyl 2,5-dianilino-3,6-dihydroterephthalate and 1 l of water was introduced by means of a two-material nozzle and 1.5 m3 of nitrogen into a tubular reactor at 590° C. In addition, a gas mixture of 400 l of air and 600 l of nitrogen was passed in at the side. 300 g of quinacridone having a purity of 97% were obtained.

Workup

  1. additionwas introduced by means of a two-material nozzle and 1.5 m3 of nitrogen into a tubular reactor at 590° C
  2. additionIn addition, a gas mixture of 400 l of air and 600 l of nitrogen

Sources & evidence

ORD record
ord-b7181f2d14404a78bc04aeda8e2a066d
Source dataset
uspto-grants-1990_09
Patent number
US04956464

Linked notes

Loading…