HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 1108538Generated: October 31, 2026
2,5-Di-p-toluidinoterephthalic acid → 5,12-Dihydro-2,9-dimethylquino(2,3-b)acridine-7,14-dione
https://huagongshe.com/reaction/1108538
Participants
| Role | Name | HCID | Charge |
|---|
| Reactant | 2,5-Di-p-toluidinoterephthalic acid | HCID 82524 | — |
| Solvent | Methanol | HCID 887 | — |
| Product | 5,12-Dihydro-2,9-dimethylquino(2,3-b)acridine-7,14-dione | HCID 70423 | 95% |
Reaction Steps
Example 5 was repeated using 25 g per minute of 2,5-di(4-methylanilino)terephthalic acid and 51 g per minute of polyphosphoric acid at a processor temperature of 160° C., followed by drowning with 100 g per minute of methanol (initial temperature of 25° C.) heated to 85° C. 2,9-Dimethylquinacridone was obtained in greater than 95% yield.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
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| Patent number | US06068695 |
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| Source dataset | uspto-grants-2000_05 |
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| ORD ID | ord-9cf659cb4c004cd68043a84e91b5d61d |
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| Source note | uspto-grants-2000_05 |
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