HuagongsheHuagongshe Chemistry Print Report · For research reference only
4-Chlorophthalic acid → 4-Chlorophthalic anhydride
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | 4-Chlorophthalic acid | HCID 6964 | — |
| Reactant | 4-Chloro-1,2-dicyanobenzene | HCID 87213 | — |
| Reactant | 4-Chlorobenzene-1,2-dicarbonyl dichloride | HCID 15044562 | — |
| Product | 4-Chlorophthalic anhydride | HCID 67044 | — |
Reaction Steps
In a conventional acidic hydrolysis, the 4-chlorophthaloyl chloride or 4-chlorophthalonitrile of Examples 7 or 8 is hydrolyzed to 4-chlorophthalic acid which, upon dehydration at over 180°-200° C., will afford a high yield of 4-chlorophthalic anhydride.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US05049682 |
| Source dataset | uspto-grants-1991_09 |
| ORD ID | ord-99a7961e4cb74bb0b5267fb6db732701 |
| Source note | uspto-grants-1991_09 |