4265. Fraxetin
Nomenclature
CAS number: 574-84-5
7,8-Dihydroxy-6-methoxy-2H-1-benzopyran-2-one; 7,8-dihydroxy-6-methoxycoumarin. C10H8O5; mol wt 208.17.
C 57.70%, H 3.87%, O 38.43%.
Description and 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.Derivative
Dimethyl ether.Nomenclature
6,7,8-Trimethoxycoumarin.C12H12O5; mol wt 236.22.
C 61.01%, H 5.12%, O 33.87%.