HuagongsheHuagongshe Chemistry Print Report · For research reference only
Thiophene-3,4-dicarboxylic acid → 1H,3H-Thieno[3,4-c]furan-1,3-dione
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | Thiophene-3,4-dicarboxylic acid | HCID 255853 | — |
| Solvent | Acetic Anhydride | HCID 7918 | — |
| Product | 1H,3H-Thieno[3,4-c]furan-1,3-dione | HCID 315608 | 98% |
Reaction Steps
Thiophene-3,4-dicarboxylic acid (12 g, 0.07 mol) is dissolved in acetic anhydride (60 ml) and boiled for 2.5 hours. The mixture is then concentrated to dryness. There is obtained 10.55 g (98%) of thiophene-3,4-dicarboxylic anhydride (m.p. 147°-149° C.).
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US05258357 |
| Source dataset | uspto-grants-1993_11 |
| ORD ID | ord-be1403e1a2dd4ec49ad740b2845098a4 |
| Source note | uspto-grants-1993_11 |