Imperatorin
Structural Formula Vector Image
Title: Imperatorin
CAS Registry Number: 482-44-0
CAS Name: 9-[(3-Methyl-2-butenyl)oxy]-7H-furo[3,2-g][1]benzopyran-7-one
Additional Names: 6-hydroxy-7-(3-methyl-2-butenyloxy)-5-benzofuranacrylic acid d-lactone; 8-isoamylenoxypsoralen; marmelosin; ammidin; pentosalen
Molecular Formula: C16H14O4
Molecular Weight: 270.28
Percent Composition: C 71.10%, H 5.22%, O 23.68%
Literature References: From roots of Imperatoria osthruthium L., Umbelliferae: Späth, Holzen, Ber. 66, 1137 (1933); from seeds of Angelica archangelica L.: Späth, Vierhapper, ibid. 71, 1667 (1938); from fruit of Pastinaca sativa L., Umbelliferae: Soine et al., J. Am. Pharm. Assoc. 45, 426 (1956). Identity with marmelosin: Späth et al., Ber. 70, 1021 (1937). Identity with ammidin: Fahmy, Abu-Shady, Q. J. Pharm. Pharmacol. 21, 499 (1948). Partial synthesis: Späth, Holzen, Ber. 68, 1123 (1935). Synthesis: Späth, Vierhapper, ibid. 70, 248 (1937).
Properties: Prisms from ether, long fine needles from hot water, mp 102°. Practically insol in cold water. Very sparingly sol in boiling water; freely sol in chloroform; sol in benzene, alcohol, ether, petr ether, alkali hydroxides. uv max: 302, 265, 250 nm (log e 3.95, 4.00, 4.24).
Melting point: mp 102°
Absorption maximum: uv max: 302, 265, 250 nm (log e 3.95, 4.00, 4.24)

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