HuagongsheHuagongshe Chemistry Print Report · For research reference only
Potassium Bromide → 5-[(1E)-2-(3,4-dihydroxyphenyl)vinyl]-benzene1,2,3-triol
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | Potassium Bromide | HCID 253877 | — |
| Reactant | 1-(3,4-Dimethoxyphenyl)-2-(3,4,5-trimethoxyphenyl) ethylene | HCID 357182 | — |
| Reactant | Pyridinium chloride | HCID 10176127 | — |
| Product | 5-[(1E)-2-(3,4-dihydroxyphenyl)vinyl]-benzene1,2,3-triol | HCID 11777365 | — |
Reaction Steps
Demethylation: The 1-(3,4-dimethoxyphenyl)-2-(3,4,5-trimethoxyphenyl) ethylene (1.3 g) on demethylation with pyridine hydrochloride (7 g) under the conditions noted in example 1 gave 1, pp. 222–224° C.; IR (KBr) νmax 3450, 3338, 1608, 1535, 1449, 1320, 1177, 1119, 1035, 956, 848, 797 cm−1; 1H NMR (CH3OD, 400 MHz) δ 6.76 (1H, s), 6.61 (1H, d, J=8.0 Hz), 6.55 (1H, d, J=16.0 Hz), 6.54 (1H, d, J=8.0 Hz), 6.50 (1H, d, J=16.0 Hz), 6.33 (2H, s).
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US07026518B2 |
| Source dataset | uspto-grants-2006_04 |
| ORD ID | ord-ed9c831a7f054685b5c3c4bbcd7e1fea |
| Source note | uspto-grants-2006_04 |