Title: Pectolinarigenin
CAS Registry Number: 520-12-7
CAS Name: 5,7-Dihydroxy-6-methoxy-2-(4-methoxyphenyl)-4H-1-benzopyran-4-one
Additional Names: 5,7-dihydroxy-4¢,6-dimethoxyflavone; 6-methoxyacacetin; 6-hydroxypelargidenon-6,4¢-dimethyl ether 1467
Molecular Formula: C17H14O6
Molecular Weight: 314.29
Percent Composition: C 64.97%, H 4.49%, O 30.54%
Literature References: From leaves of Linaria vulgaris Mill., Scrophulariaceae: Schmid, Rumpel, Monatsh. Chem. 57, 421 (1931); Merz, Wu, Arch. Pharm. 274, 126 (1936). Structure: Schmid, Rumpel, Monatsh. Chem. 60, 8 (1932). Synthesis: Wessely, Moser, ibid. 56, 97 (1930); Zemplén, Farkas, Ber. 76, 937 (1943); Murti, Seshadri, Proc. Indian Acad. Sci. 30A, 78 (1949), C.A. 44, 3987d (1950); Farkas, Strelisky, Tetrahedron Lett. 1970, 187.
Properties: Yellow needles from methanol, mp 220-223°. uv max (methanol): 275, 335 nm. Sol in alcohol, acetone, ether, ethyl acetate. Practically insol in water, benzene, chloroform, petr ether.
Melting point: mp 220-223°
Absorption maximum: uv max (methanol): 275, 335 nm
Derivative Type: Diacetate
Molecular Formula: C21H18O8
Molecular Weight: 398.36
Percent Composition: C 63.32%, H 4.55%, O 32.13%
Properties: Needles from 96% alcohol, mp 151°.
Melting point: mp 151°
Derivative Type: 7-Rutinoside
Additional Names: Pectolinarin; neolinarin
Molecular Formula: C29H34O15
Molecular Weight: 622.57
Percent Composition: C 55.95%, H 5.50%, O 38.55%
Properties: From leaves of L. vulgaris Mill., Scrophulariaceae: Klobb, Compt. Rend. 145, 331 (1907); Zemplén et al., Ber. 75, 489 (1942); from Cirsium oleraceum Scop., Compositae: Wagner et al., Arch. Pharm. 293, 1053 (1960). Structure: Zemplén, Bognár, Ber. 74, 1818 (1941). Yellow crystals from methanol, mp 275°. uv max (methanol): 275, 330 nm (log e 4.256, 4.365).
Melting point: mp 275°
Absorption maximum: uv max (methanol): 275, 330 nm (log e 4.256, 4.365)
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