HuagongsheHuagongshe Chemistry Print Report · For research reference only
Benzidine → 2-Phenylquinoxaline
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | Benzidine | HCID 7111 | — |
| Reactant | 3,3'-Dihydroxybenzidine | HCID 16918 | — |
| Reactant | 3,4-Diaminobenzoic acid | HCID 69263 | — |
| Reactant | 4,5-Diaminophthalic acid | HCID 19105448 | — |
| Product | 2-Phenylquinoxaline | HCID 78725 | — |
Reaction Steps
One proceeds in accordance with Example 1, where in place of 3,4-diaminobenzoic acid, 4,5-diaminophthalic acid is used, and in place of 3,3'-dihydroxy-4,4'-diaminobiphenyl, 4.4'- diaminobiphenyl is used. Via tetracarboxylic acid, or the corresponding acid chloride, as an intermediate stage, a copolymer with phenylquinoxaline units and o-carboxyamide groupings (-CO-NH-) is thereby obtained. When annealed to approximately 400° C., they cyclize into imide structures.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US05278277 |
| Source dataset | uspto-grants-1994_01 |
| ORD ID | ord-154d779a13a44ad69320c66de37f660d |
| Source note | uspto-grants-1994_01 |