Title: Isoflavone
CAS Registry Number: 574-12-9
CAS Name: 3-Phenyl-4H-1-benzopyran-4-one
Additional Names: 3-phenylchromone
Molecular Formula: C15H10O2
Molecular Weight: 222.24
Percent Composition: C 81.07%, H 4.54%, O 14.40%
Literature References: Prepn from o-hydroxyphenyl benzyl ketone, sodium dust and ethyl formate: Joshi, Venkataraman, J. Chem. Soc. 1934, 513. Structure: Warburton, Q. Rev. Chem. Soc. 8, 67 (1954).
Properties: Leaflets and needles from petr ether, mp 148°. uv max: 245, 307 nm (log e 4.41, 3.82).
Melting point: mp 148°
Absorption maximum: uv max: 245, 307 nm (log e 4.41, 3.82)