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| | Rhamnetin Basic information |
| | Rhamnetin Chemical Properties |
| Melting point | 293-296°C (dec.) | | Boiling point | 375.7°C (rough estimate) | | density | 1.3347 (rough estimate) | | refractive index | 1.4790 (estimate) | | storage temp. | 2-8°C | | solubility | DMSO (Slightly), Methanol (Slightly, Heated) | | pka | 6.15±0.40(Predicted) | | form | neat | | color | Light Yellow to Dark Yellow | | BRN | 47741 | | Stability: | Hygroscopic | | LogP | 2.580 (est) | | CAS DataBase Reference | 90-19-7(CAS DataBase Reference) |
| | Rhamnetin Usage And Synthesis |
| Uses | O-Methylated metabolite of the flavanoid Quercertin (Q509500) with antioxidant activity. | | Definition | ChEBI: A monomethoxyflavone that is quercetin methylated at position 7. | | Purification Methods | Crystallise rhamnetin from EtOH (m 292-293o), aqueous EtOH (m 294-296o) or MeOH (m 290-294o). or Me2CO/MeOH. [Kuhn & Low Chem Ber 77 211 1944, Jurd J Am Chem Soc 80 5531 1958.] The tetra-acetate has m 189-190o (from Me2CO/MeOH). [Beilstein 18 H 245, 18 II 237, 18 III/IV 3474.] |
| | Rhamnetin Preparation Products And Raw materials |
| Raw materials | 4H-1-Benzopyran-4-one, 3-[(6-deoxy-α-L-mannopyranosyl)oxy]-2-(3,4-dihydroxyphenyl)-5-hydroxy-7-methoxy--->Quercetin 3,3’,4’,5-Tetraacetate-->2-(2,2-Diphenyl-1,3-benzodioxol-5-yl)-5,7-dihydroxy-3-(phenylmethoxy)-4H-1-benzopyran-4-one-->2-(2,2-diphenylbenzo[d][1,3]dioxol-5-yl)-3,5,7-trihydroxy-4H-chroMen-4-one-->Quercetin-->Dimethyl sulfate-->Iodomethane | | Preparation Products | 3,7-DIMETHOXY-3',4',5-TRIHYDROXYFLAVONE-->4',7-DIMETHOXY-3,3',5-TRIHYDROXYFLAVONE-->3-O-Methylquercetin-->TAMARIXETIN |
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