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CAS No 20725-03-5 , 4H-1-Benzopyran-4-one,2-(3,4-dihydroxyphenyl)-2,3-dihydro-3,7-dihydroxy-, (2R,3R)-rel- Search by region : Japan

  • Name: 4H-1-Benzopyran-4-one,2-(3,4-dihydroxyphenyl)-2,3-dihydro-3,7-dihydroxy-, (2R,3R)-rel-
  • CAS Registry Number:
  • Density: 1.599 g/cm3
  • Refractive index: 1.728
  • Safety Statements: 26-36
  • EINECS: 243-989-6
  • Molecular Weight: 288.2522
  • InChI: InChI=1/C15H12O6/c16-8-2-3-9-12(6-8)21-15(14(20)13(9)19)7-1-4-10(17)11(18)5-7/h1-6,14-18,20H/t14-,15+/m0/s1
  • Risk Statements: 36/37/38
  • Molecular Formula: C15H12 O6
  • Molecular Structure:CAS No:20725-03-5 4H-1-Benzopyran-4-one,2-(3,4-dihydroxyphenyl)-2,3-dihydro-3,7-dihydroxy-, (2R,3R)-rel-

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20725-03-5 4H-1-Benzopyran-4-one,2-(3,4-dihydroxyphenyl)-2,3-dihydro-3,7-dihydroxy-, (2R,3R)-rel-

  • Japan Nacalai Tesque, Inc. [Manufacturers]
  • Tel: 81 75 251 1723 81-75-251-1730
  • Fax: 81-75-251-1763
  • Address: Nijo Karasuma, Nakagyo-ku Kyoto 604-0855 Japan Nakagyo-ku,KyotoJapan
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References of 4H-1-Benzopyran-4-one,2-(3,4-dihydroxyphenyl)-2,3-dihydro-3,7-dihydroxy-, (2R,3R)-rel-
Title: Fustin
CAS Registry Number: 20725-03-5
CAS Name: (2R,3R)-rel-2-(3,4-Dihydroxyphenyl)-2,3-dihydro-3,7-dihydroxy-4H-1-benzopyran-4-one
Synonyms: 3,3￠,4￠,7-tetrahydroxyflavanone; dihydrofisetin
Molecular Formula: C15H12O6
Molecular Weight: 288.25
Percent Composition: C 62.50%, H 4.20%, O 33.30%
Literature References: From wood of Rhus cotinus L. (Venice sumac) and R. succedanea L., Anacardiaceae: Schmid, Ber. 19, 1734 (1886); from Gleditsia triacanthos L., Leguminosae: Chadenson et al., Compt. Rend. 249, 1362 (1955). Structure: Oyamada, Ann. 538, 44 (1939). Stereochemistry: Weinges, Ann. 627, 229 (1959); Roux, Paulus, Biochem. J. 77, 315 (1960); Gaffield, Tetrahedron 26, 4093 (1970).
 
Derivative Type: (±)-Form
Properties: Crystals, mp 226-228°. [a]D21 -2.4°.
Melting point: mp 226-228°
Optical Rotation: [a]D21 -2.4°
 
Derivative Type: (±)-Form tetraacetate
Molecular Formula: C23H20O10
Molecular Weight: 456.40
Percent Composition: C 60.53%, H 4.42%, O 35.06%
Properties: Crystals from methanol, mp 147-148°.
Melting point: mp 147-148°
 
Derivative Type: (-)-Form
Properties: Crystals, mp 216-218°. [a]D25 -26° (c = 2 in 1:1 acetone, water).
Melting point: mp 216-218°
Optical Rotation: [a]D25 -26° (c = 2 in 1:1 acetone, water)
 
Derivative Type: (-)-Form tetraacetate
Properties: Crystals, mp 117-118°. [a]D23 -25.2° (c = 0.8 in tetrachloroethane).
Melting point: mp 117-118°
Optical Rotation: [a]D23 -25.2° (c = 0.8 in tetrachloroethane)
 
Derivative Type: (+)-Form
Properties: Needles from water, mp 228-229°. [a]D23 +28.3° (c = 0.9 in 1:1 acetone, water).
Melting point: mp 228-229°
Optical Rotation: [a]D23 +28.3° (c = 0.9 in 1:1 acetone, water)
 
Derivative Type: (+)-Form tetraacetate
Properties: Crystals from ethanol, mp 116-119°. [a]D25 +24.4° (c = 1.3 in tetrachloroethane).
Melting point: mp 116-119°
Optical Rotation: [a]D25 +24.4° (c = 1.3 in tetrachloroethane)