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Acetylation of 8-Bromo-5-hydroxy-6,7,4′-trimethoxyflavone
Authors:E. K. Donbaeva  V. I. Yamovoi  B. I. Tuleuvov  K. M. Turdybekov  Yu. V. Gatilov  S. M. Adekenov
Affiliation:(1) Institute of Phytochemistry, Ministry of Education and Science of Kazakhstan, Karaganda, Kazakhstan;(2) Novosibirsk Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Abstract:5-Hydroxy-6,7,4′-trimethoxyflavone was isolated from Centaurea pseudomaculosa Dobrocz., and its bromo derivative was obtained. The reaction of 8-bromo-5-hydroxy-6,7,4′-trimethoxyflavone with acetic anhydride in the presence of a catalytic amount of p-toluenesulfonic acid gave of a 73% 5-acetoxy-8-bromo derivative whose structure was established by X-ray diffraction.__________Translated from Zhurnal Obshchei Khimii, Vol. 75, No. 6, 2005, pp. 999–1001.Original Russian Text Copyright © 2005 by Donbaeva, Yamovoi, Tuleuvov, Turdybekov, Gatilov, Adekenov.
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