Structural Formula Vector Image
Title: b-Citraurin
CAS Registry Number: 650-69-1
CAS Name: 3-Hydroxy-8¢-apo-b,y-carotenal
Additional Names: citraurin
Molecular Formula: C30H40O2
Molecular Weight: 432.64
Percent Composition: C 83.28%, H 9.32%, O 7.40%
Literature References: Carotenoid pigment found only in orange peel. Isoln by chromatography: Zechmeister, Tuzson, Ber. 69, 1878 (1936); 70, 1966 (1937). The peels from 100 kilos of oranges yield about 35 mg. Structure: Zechmeister, Tuzson, loc. cit.; Karrer, Solmssen, Helv. Chim. Acta 20, 682 (1937); Karrer et al., ibid. 1020; Zechmeister, v. Cholnoky, Ann. 530, 291 (1937); Karrer et al., Helv. Chim. Acta 21, 445 (1938). Abs config: Bartlett et al., J. Chem. Soc. C 1969, 2527. Synthesis: H. Pfander et al., Helv. Chim. Acta 63, 1377 (1980).
Properties: Thin orange or yellow-colored plates from benzene + petr ether, mp 147°. Absorption max (benzene): 497, 467 nm. Freely sol in acetone, ethanol, ether, benzene, and carbon disulfide. Sparingly sol in petr ether.
Melting point: mp 147°
Absorption maximum: Absorption max (benzene): 497, 467 nm

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