HuagongsheHuagongshe Chemistry Print Report · For research reference only
Hydrochloric Acid → Dapsone
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | Hydrochloric Acid | HCID 313 | — |
| Reactant | p-Toluenesulfonic acid | HCID 6101 | — |
| Reactant | 4-((4-Nitrophenyl)sulfonyl)benzenamine | HCID 74762 | — |
| Reactant | HCID 178418361 | HCID 178418361 | — |
| Catalyst | Palladium | HCID 23938 | — |
| Solvent | Methanol | HCID 887 | — |
| Solvent | Water | HCID 962 | — |
| Product | Dapsone | HCID 2955 | 91.9% |
Reaction Steps
In a hydrogenation vessel 4-(4′-Nitro-benzenesulfonyl)-phenylamine (100 g), p-toluensulfonic acid (68.4 g), methanol (350 ml), water (150 ml) and 10% palladium on charcoal (7.6 g) are charge. The mixture is allowed to react with hydrogen at approximately 50° C. and 5 bar pressure. At reaction completion, hydrochloric acid is added, the catalyst is filtered and dried. 82 g of crude Dapsone are obtained (82% yield; >99.5% purity).
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US07531694B2 |
| Source dataset | uspto-grants-2009_05 |
| ORD ID | ord-5cfbd91163c64d64bab51b68c7074138 |
| Source note | uspto-grants-2009_05 |