Phosphorus oxide (P4O10) → Quinacridone

HRID 2057790Notes

Reaction equation

HRID 2057790 reaction equation
[NH:1]([C:8]1[CH:16]=[C:15]([C:17](O)=[O:18])[C:14]([NH:20][C:21]2[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=2)=[CH:13][C:9]=1[C:10](O)=[O:11])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.O=P12OP3(OP(OP(O3)(O1)=O)(=O)O2)=O>>[CH:24]1[CH:25]=[C:26]2[C:17]([C:15]3[C:14]([NH:20][C:21]2=[CH:22][CH:23]=1)=[CH:13][C:9]1[C:10]([C:7]2[C:2]([NH:1][C:8]=1[CH:16]=3)=[CH:3][CH:4]=[CH:5][CH:6]=2)=[O:11])=[O:18]

Participants

3

Reactant 2

HCID 14812Phosphorus oxide (P4O10)HCID 823512,5-Dianilinoterephthalic acid

Product 1

HCID 13976Quinacridone

Procedure

3 Parts by weight of 2,5-dianilino-terephthalic acid are added while stirring to 9 parts by weight of acidic polyphosphoric acid methyl ester having a P2O5 content of from 81.5 to 82.5%, at a temperature of from 120° to 125° C., thereby effecting condensation to yield the linear quinacridone. The cyclized molten product is hydrolyzed in 30 parts by weight of water. The precipitated crude quinacridone is filtered off and washed until free of acid.

Workup

  1. customof from 120° to 125° C.
  2. customcondensation

Sources & evidence

ORD record
ord-5c88fe8febca42c7a0764f7caf6597e1
Source dataset
uspto-grants-1980_07
Patent number
US04212975

Reaction notes

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