Participants
| Role | Name | HCID | Charge |
|---|
| Reactant | Hydrochloric Acid | HCID 313 | — |
| Reactant | Hydrogen Peroxide | HCID 784 | — |
| Reactant | Potassium Hydroxide | HCID 14797 | — |
| Reactant | HCID 10972868 | HCID 10972868 | — |
| Solvent | 1,4-Dioxane | HCID 31275 | — |
| Product | HCID 71014731 | HCID 71014731 | 86% |
Reaction Steps
Benzo[1,2-b;4,5-b′]dithiophene-4,4,8,8-tetracarboxylic acid tetraethyl ester (20g) was suspended in dioxane (600g) and KOH (75g) under inert atmosphere and heated to 40° C. Hydrogenperoxide (8.6 g; w=35%) was added and the suspension heated at 50° C. for 3 hours. The reaction mixture was acidified with 2M HCl (730 g) and the yellow precipitate filtered off, washed with water and dried in vacuum to yield benzo[1,2-b;4,5-b′]dithiophene-4,8-dicarboxylic acid (10,1 g) in 86% yield.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|
| Patent number | US09216994B2 |
|---|
| Source dataset | uspto-grants-2015_12 |
|---|
| ORD ID | ord-c4f7830c710a4c059a91702e136bec27 |
|---|
| Source note | uspto-grants-2015_12 |
|---|
