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CAS No. : | 477-90-7 | MDL No. : | MFCD00133120 |
Formula : | C14H16O9 | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | YWJXCIXBAKGUKZ-HJJNZUOJSA-N |
M.W : | 328.27 | Pubchem ID : | 66065 |
Synonyms : |
Cuscutin;Bergenin;NSC 661749;(–)-Bergenin
|
Chemical Name : | (2R,3S,4S,4aR,10bS)-3,4,8,10-Tetrahydroxy-2-(hydroxymethyl)-9-methoxy-3,4,4a,10b-tetrahydropyrano[3,2-c]isochromen-6(2H)-one |
Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P280-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | H302 | Packing Group: | N/A |
GHS Pictogram: |
* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
In ethanol; water; at 40℃; for 8h; | Example 8: Synthesis of 2,3,4,4a-tetrahydro-3,4,8,10-tetrahydroxy-2- (hydroxymethyl)-7-((2-(hydroxymethyl)pyrrolidin-l-yl)methyl)-9- methoxypyrano[3,2-c]isochromen-6(10bH)-one (Compound 8). To the solution of bergenin (32 mg, 1 mmol) in water: ethanol (1 : 1 ; 2 mL), 37percent formaldehyde solution (0.5 mL) and one equivalent of <strong>[498-63-5]prolinol</strong> (1 mmol) was added. The solution was stirred at 40 °C for 8 h, and the mixture was diluted with water and passed through HP20 resin bed to remove DMSO and then it was purified over sephadex LH-20 in methanol to get pure compound 8. White powder; m.p. 194-196 °C; 1 H-NMR (DMSO-d6, 500 MHz): delta 4.50 (d, J = 10 Hz, 1H, H-lOb), 3.78 (brs, 1 H, H-l la), 3.71 (m, 2H, H-4, H-l lb), 3.59 (m, 2H, H-6'), 3.54 (brs, 4H, OCH3, H-4a), 3.16 (m, 2H, H-2, H-3), 2.71 (S, 2H, H- 12), 2.50 (brs, 3H, H-5\ H-2'), 2.10 (m, 1H, H-3 'b), 2.04 (m, 1H, H-3'a), 1.90 (m, 1H, H-4'b), 1.71 (m, 1H, H-4'a); ESI-MS: mlz 442 [M+l]+. |