Title: Capsanthin
CAS Registry Number: 465-42-9
CAS Name: (3R,3¢S,5¢R)-3,3¢-Dihydroxy-b,k-caroten-6¢-one
Molecular Formula: C40H56O3
Molecular Weight: 584.87
Percent Composition: C 82.14%, H 9.65%, O 8.21%
Literature References: Carotenoid pigment isolated from paprika (Capsicum annuum L., Solanaceae): L. Zechmeister, L. Cholnoky, Ann. 454, 54 (1927); L. Cholnoky et al., Ann. 606, 194 (1957); Warren, Weedon, J. Chem. Soc. 1958, 3972. Structure: Entschel, Karrer, Helv. Chim. Acta 43, 89 (1960); Faigle, Karrer, ibid. 44, 1257, 1904 (1961). Absolute configuration: Bartlett et al., J. Chem. Soc. C 1969, 2527. Crystal structure: I. Ueda, W. Nowacki, Verh. Schweiz. Naturforsch. Ges. 1971, 152, C.A. 77, 106449h (1972).
Properties: Deep carmine-red needles from petr ether, mp 181-182°. Absorption max 483 nm (e ´ 10-3 121). [a]Cd +36° (chloroform). Freely sol in acetone, chloroform. Sol in methanol, ethanol, ether, benzene. Slightly sol in petr ether, CS2.
Melting point: mp 181-182°
Optical Rotation: [a]Cd +36° (chloroform)
Absorption maximum: Absorption max 483 nm (e ´ 10-3 121)
Derivative Type: Diacetate
Molecular Formula: C44H60O5
Molecular Weight: 668.94
Percent Composition: C 79.00%, H 9.04%, O 11.96%
Properties: Red plates from methanol, mp 150°.
Melting point: mp 150°
Derivative Type: Dipalmitate
Molecular Formula: C72H116O5
Molecular Weight: 1061.69
Percent Composition: C 81.45%, H 11.01%, O 7.53%
Properties: Bordeaux-red plates from benzene + methanol, mp 95°.
Melting point: mp 95°
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