HuagongsheHuagongshe Chemistry Print Report · For research reference only
Hydrogen Bromide → HCID 20296847, compound
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | Hydrogen Bromide | HCID 260 | — |
| Reactant | Acetic Anhydride | HCID 7918 | — |
| Reactant | HCID 20296846 | HCID 20296846 | — |
| Solvent | Acetic Acid | HCID 176 | — |
| Product | HCID 20296847 | HCID 20296847 | 77.8% |
Reaction Steps
Demethylation of 114 g 3,4'-dimethoxy-4-methyl-benzophenone (0.445 mole) was effected by refluxing 15 hr. with a previously prepared mixture of 313.5 ml of 48% aqueous hydrobromic acid, 148 ml of acetic anhydride, and 148 ml of acetic acid. The isolated product melted at 173°-174° C. Recrystallization from ethanol/water yielded 79 g (0.346 mole) of 3,4'-dihydroxy-4-methylbenzophenone melting at 174°-175° C.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US04245082 |
| Source dataset | uspto-grants-1981_01 |
| ORD ID | ord-25e81c0b1184470dab71e9a1bf8d69c9 |
| Source note | uspto-grants-1981_01 |