Participants
| Role | Name | HCID | Charge |
|---|
| Reactant | Hydrochloric Acid | HCID 313 | — |
| Reactant | 1,3-Dimethoxy-5-(2-phenylethenyl)benzene | HCID 238778 | — |
| Reactant | Pyridinium chloride | HCID 10176127 | — |
| Solvent | Diethyl Ether | HCID 3283 | — |
| Product | 5-Styrylresorcinol | HCID 100754 | — |
Reaction Steps
For demethylation, a homogeneous mixture of 54.0 g (0.22 mol) of 3,5-dimethoxystilbene and 40.0 g (0.35 mol) of pyridine hydrochloride is heated at about 165° C. for 3 hours. The cooled, oily reaction mass is then introduced into 1.2 liters of 2N hydrochloric acid and the crude product is isolated by extraction with diethyl ether. Recrystallisation from toluene yields 3,5-dlihydroxystilbene in the form of a pale-yellow powder.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|
| Patent number | US06814960B1 |
|---|
| Source dataset | uspto-grants-2004_11 |
|---|
| ORD ID | ord-f57433c302ef4ff3a532caffc32899ab |
|---|
| Source note | uspto-grants-2004_11 |
|---|
