Title: Fraxetin
CAS Registry Number: 574-84-5
CAS Name: 7,8-Dihydroxy-6-methoxy-2H-1-benzopyran-2-one
Additional Names: 7,8-dihydroxy-6-methoxycoumarin
Molecular Formula: C10H8O5
Molecular Weight: 208.17
Percent Composition: C 57.70%, H 3.87%, O 38.43%
Literature References: The aglucon of fraxin. Obtained by heating fraxin with dil H2SO4. Structure: Wessely, Demmer, Ber. 61, 1279 (1928). Synthesis: Aghoramurthy, Seshadri, J. Chem. Soc. 1954, 3065.
Properties: Plates from alc, mp 228°. Turns yellow at 150° and brown at mp. Sol in 10 liters cold water, in 300 ml boiling water; somewhat more sol in alcohol; hardly sol in ether.
Melting point: mp 228°
Derivative Type: Dimethyl ether
Additional Names: 6,7,8-Trimethoxycoumarin
Molecular Formula: C12H12O5
Molecular Weight: 236.22
Percent Composition: C 61.01%, H 5.12%, O 33.87%
Properties: Orthorhombic bipyramidal crystals, mp 104°. bp0.2 90-100°.
Melting point: mp 104°
Boiling point: bp0.2 90-100°
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