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CAS No 520-34-3 , 5,7-dihydroxy-2-(3-hydroxy-4-methoxyphenyl)chromen-4-one Search by region : Germany

  • Name: 5,7-dihydroxy-2-(3-hydroxy-4-methoxyphenyl)chromen-4-one
  • Synonyms: CHEBI:4630;Luteolin 4'-methyl ether; 5,7,3'-Trihydroxy-4'-methoxyflavone; 520-34-3;5,7-dihydroxy-2-(3-hydroxy-4-methoxyphenyl)chromen-4-one;
  • CAS Registry Number:
  • Density: 1.512 g/cm3
  • Refractive index: 1.697
  • Hazard Symbols: Xi: Irritant;
  • EINECS: 208-291-8
  • Molecular Weight: 300.26288
  • InchiKey: MBNGWHIJMBWFHU-UHFFFAOYSA-N
  • InChI: InChI=1S/C16H12O6/c1-21-13-3-2-8(4-10(13)18)14-7-12(20)16-11(19)5-9(17)
    6-15(16)22-14/h2-7,17-19H,1H3
  • Molecular Formula: C16H12O6
  • Molecular Structure:CAS No:520-34-3 5,7-dihydroxy-2-(3-hydroxy-4-methoxyphenyl)chromen-4-one

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520-34-3 Diosmetin; 85%

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520-34-3 Diosmetin

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References of 5,7-dihydroxy-2-(3-hydroxy-4-methoxyphenyl)chromen-4-one
Title: Diosmetin
CAS Registry Number: 520-34-3
CAS Name: 5,7-Dihydroxy-2-(3-hydroxy-4-methoxyphenyl)-4H-1-benzopyran-4-one
Synonyms: 3￠,5,7-trihydroxy-4￠-methoxyflavone; cyanidenon-4￠-methyl ether 1479; luteolin-4￠-methyl ether
Molecular Formula: C16H12O6
Molecular Weight: 300.26
Percent Composition: C 64.00%, H 4.03%, O 31.97%
Literature References: Aglycone of diosmin, q.v. Prepn from diosmin isolated from various plant sources: O. A. Oesterle, G. Wander, Helv. Chim. Acta 8, 519 (1925); isoln from lemons (Citrus limon Linn., Rutaceae): R. M. Horowitz, J. Org. Chem. 21, 1184 (1956). Synthesis and structural elucidation: G. Zemplén, R. Bognár, Ber. 76, 452 (1943). Synthesis: A. Lovecy et al., J. Chem. Soc. 1930, 817; N. B. Lorette et al., J. Org. Chem. 16, 930 (1951); J. H. Looker, M. J. Holm, ibid. 24, 1019 (1959). HPLC determn in biological fluids: D. Baylocq et al., Ann. Pharm. Fr. 41, 115 (1983).
 
Derivative Type: Hemimethanolate
Molecular Formula: C16H12O6.?CH3OH
Molecular Weight: 316.28
Percent Composition: C 62.66%, H 4.46%, O 32.88%
Properties: Yellow needles from alcohol/ethyl acetate, sinters at 248°. mp 253-254°. Also reported as small yellow needles from methanol, mp 258-259° (Horowitz). uv max: 345, 268, 253 nm (log e 4.32, 4.25, 4.28).
Melting point: mp 253-254°; mp 258-259° (Horowitz)
Absorption maximum: uv max: 345, 268, 253 nm (log e 4.32, 4.25, 4.28)
 
Derivative Type: Triacetate
Molecular Formula: C22H18O9
Molecular Weight: 426.37
Percent Composition: C 61.97%, H 4.26%, O 33.77%
Properties: Colorless needles from methanol, mp 195-196°.
Melting point: mp 195-196°