CAS No 120-05-8 , 3(2H)-Benzofuranone,2-[(3,4-dihydroxyphenyl)methylene]-6-hydroxy-, (2Z)-

Name: 3(2H)-Benzofuranone,2-[(3,4-dihydroxyphenyl)methylene]-6-hydroxy-, (2Z)-
Synonyms: 3',4',6-Trihydroxybenzalcoumaranone; Sulfuretin (6CI);3(2H)-Benzofuranone,2-(3,4-dihydroxybenzylidene)-6-hydroxy- (7CI,8CI);2-(3,4-Dihydroxybenzylidene)-6-hydroxy-3(2H)-benzofuranone; Sulphuretin; 3(2H)-Benzofuranone,2-[(3,4-dihydroxyphenyl)methylene]-6-hydroxy-, (Z)-;3(2H)-Benzofuranone,2-[(3,4-dihydroxyphenyl)methylene]-6-hydroxy-, (2Z)-;3',4',6-Trihydroxyaurone;
CAS Registry Number:120-05-8
Density: 1.597 g/cm³
Refractive index: 1.793
EINECS: 204-366-4
Molecular Weight: 270.2369
InChI: InChI=1/C15H10O5/c16-9-2-3-10-13(7-9)20-14(15(10)19)6-8-1-4-11(17)12(18)5-8/h1-7,16-18H/b14-6+
Molecular Formula: C15H10 O5
Molecular Structure:

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References of 3(2H)-Benzofuranone,2-[(3,4-dihydroxyphenyl)methylene]-6-hydroxy-, (2Z)-

Title: Sulfuretin
CAS Registry Number: 120-05-8
CAS Name: (Z)-2-[(3,4-Dihydroxyphenyl)methylene]-6-hydroxy-3(2H)-benzofuranone
Synonyms: 2-(3,4-dihydroxybenzylidene)-6-hydroxy-3(2H)-benzofuranone; 3￠,4￠,6-trihydroxyaurone; 3￠,4￠,6-trihydroxybenzalcoumaranone
Molecular Formula: C15H10O5
Molecular Weight: 270.24
Percent Composition: C 66.67%, H 3.73%, O 29.60%
Literature References: Flavonoid pigment responsible for the yellow color of certain species of Compositae. Isoln from Cosmos sulphureus Cav., Compositae: Shimokoriyama, Hattori, J. Am. Chem. Soc. 75, 1900 (1953); from Dahlia variabilis Desf., Compositae: Nordstr?m, Swain, Arch. Biochem. Biophys. 60, 329 (1956). Prepn by condensation of 6-hydroxy-3-coumaranone and protocatechuic alcohol: Nordstr?m, Swain, ibid. Prepn and structure studies: Geissman, Jurd, J. Am. Chem. Soc. 76, 4475 (1954); Farkas et al., Ber. 92, 2847 (1959). Structure: Shimokoriyama, Geissman, J. Org. Chem. 25, 1956 (1960).
Properties: Orange crystals from dil alc, mp 280-285° (Shimokoriyama), mp 315° (dec) (Nordstr?m), mp 302-304° (Farkas). uv max: 398 nm.
Melting point: mp 280-285° (Shimokoriyama); mp 315° (dec) (Nordstr?m); mp 302-304° (Farkas)
Absorption maximum: uv max: 398 nm

Derivative Type: Triacetate
Molecular Formula: C21H16O8
Molecular Weight: 396.35
Percent Composition: C 63.64%, H 4.07%, O 32.29%
Properties: Pale yellow needles from methanol, mp 191-194° (Shimokoriyama), mp 167-168° (Nordstr?m).
Melting point: mp 191-194° (Shimokoriyama); mp 167-168° (Nordstr?m)