Abstract
Since flavonols (l, R = OH) are simply flavones (1,R = H) in which the 3-position is substituted by a hydroxyl, both classes of pigment have so far been considered together (Venkataraman, 1959; Gripenberg in Geissman, 1962, p. 406; Dean, 1963, p. 280). This practice is justified in that much of their chemistry—analysis, synthesis, reactions—has a common theoretical basis. However, today it is apparent that this simple difference in structure is of considerable biosynthetic, physiological, phylogenetic, chemosystematic, pharmacological and analytical significance.
Dedicated to the memory of Dr. Paulo Carvalho Ferreira, Professor of Organic Chemistry, University of São Paulo, Brasil.
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Howard, G. Z., Mabry, T. J. and Raven, P. H. (1972), Phytochemistry 11, 289.
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Hubert-Habart, M., Menichi, G., Takagi, K., Cheutin, A., Desvoye, M. L. and Royer, R. (1968), Chim. Ther. 3, 280.
Hurst, H. M. and Harborne, J. B. (1967), Phytochemistry 6, 1111.
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Jablonowski, W. and Orluk, D. (1967), Med. Lodz. 9, 267; [Chem Abstr. 70, 36520(1969)].
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Jain, A. C. and Seshadri, T. R. (1964), Phytochemistry 3, 381.
Janzso, G., Kallay, F. and Koczor, I. (1966), Tetrahedron 22, 2909.
Jay, M. (1967), C r. Acad. Sci., Ser. D 265, 1086.
Jefferies, P. R., Knox, J. R. and Middleton, E. J. (1962), Aust. J. Chem. 18, 532
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Jerzmanowska, Z. and Jurkowska-Kowalczyk, E. (1970), Rocz. Chem 44, 1395.
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Kinoshita, K. and Murase, S. (1971), Yakugaku Zasshi 91, 1105.
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Kotasek, Z. and Langmaier, F. (1961), Veda a Vyzkum v Prumyslu Kozedelnem 6, 7; [Chem Abstr. 57, 13937 (1962)].
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Krishnamurti, M., Ramanathan, J. D., Seshadri, T. R. and Shankaran, P. R. (1965a).Indian J. Chem 3, 270.
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Krishnamurti, M., Seshadri, T. R. and Shankaran, P. R. (1966), Tetrahedron 22, 941.
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Krug, H. and Borkowski, B. (1965), Pharmazie 20, 692.
Kubitzki, K. (1968), Ber. dt. bot. Ges. 81, 238.
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Kupchan, S. M. and Bauerschmidt, E. (1971), Phytochemistry 10, 664.
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Lebreton, P., Jay, M. and Voirin, B. (1967), Chim. analyt. (Pari8) 49, 375.
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Loth, H. and Diedrich, H. (1968b), Tetrahedron Letters 715.
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MacKenzie, A. M. (1969), Phytochemistry 8, 1813.
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Markham, K. R. and Mabry, T. J. (1968), Phytochemistry 7, 791.
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Matsuura, T. and Matsushima, H. (1968), Tetrahedron 24, 6615.
Matsuura, T., Matsushima, H. and Nakashima, R. (1970), Tetrahedron 26, 435.
Matsuura, T., Takemoto, T. and Nakashima, R. (1971), Tetrahedron Letters 1539.
Mears, J. A. and Mabry, T. J. (1972), Phytochemistry 11, 411.
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Mollov, N. M., Ivanov, I. C., Georgiev, V. St., Panov, P. P. and Kotsev, N. (1971), Planta med. 19, 10.
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Mukerjee, S. K., Sarkar, S. C. and Seshadri, T. R. (1969a), Tetrahedron 25, 1063.
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Nair, A. G. R. and Subramanian, S. S. (1962b), Curr. Sci. 31, 504.
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Nielsen, J. G. (1970), Tetrahedron Letters 803.
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Sasaki, T. and Mikami, M. (1963), Yakugaku Zasshi 83, 897.
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Gottlieb, O.R. (1975). Flavonols. In: Harborne, J.B., Mabry, T.J., Mabry, H. (eds) The Flavonoids. Springer, Boston, MA. https://doi.org/10.1007/978-1-4899-2909-9_7
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