Structural Formula Vector Image
Title: Baptigenin
CAS Registry Number: 5908-63-4
CAS Name: 7-Hydroxy-3-(3,4,5-trihydroxyphenyl)-4H-1-benzopyran-4-one
Additional Names: 7,3¢,4¢,5¢-tetrahydroxyisoflavone
Molecular Formula: C15H10O6
Molecular Weight: 286.24
Percent Composition: C 62.94%, H 3.52%, O 33.54%
Literature References: The aglucon of baptisin. From baptisin by acid hydrolysis or vacuum sublimation. From radix Baptisiae: Fischer, Ehrlich, C.A. 31, 44493 (1937). Structure: Böhm, Arzneim.-Forsch. 10, 472 (1960). Synthesis: Farkas et al., Ber. 96, 1865 (1963). See also Pseudobaptigenin.
Properties: Needles from dil ethanol, mp 284-285°. Begins to sublime at 240°. Sublimes in oil pump vacuum at 180-200°. uv max (ethanol): 270.2, 247 nm. Practically insol in water, ammonia water; slightly sol in dil alc, hot glacial acetic acid; sol in acetone, in NaOH solns.
Melting point: mp 284-285°
Absorption maximum: uv max (ethanol): 270.2, 247 nm
Derivative Type: Tetraacetylbaptigenin
Molecular Formula: C23H18O10
Molecular Weight: 454.38
Percent Composition: C 60.80%, H 3.99%, O 35.21%
Properties: Needles from methanol, mp 214°.
Melting point: mp 214°
Derivative Type: Tetrabenzoylbaptigenin
Molecular Formula: C43H26O10
Molecular Weight: 702.66
Percent Composition: C 73.50%, H 3.73%, O 22.77%
Properties: Prisms from methanol, mp 191-192°.
Melting point: mp 191-192°
Derivative Type: Tetramethylbaptigenin
Molecular Formula: C19H18O6
Molecular Weight: 342.34
Percent Composition: C 66.66%, H 5.30%, O 28.04%
Properties: Crystals from methanol, mp 144-145°.
Melting point: mp 144-145°

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