Selective demethylation of di-and tri-methoxyanthraquinones via aryloxydifluoroboron chelates. Synthesis of 4-hydroxy-1, 5-dimethoxyanthraquinone and 1, 4- …

PN Preston, T Winwick, JO Morley

Index: Preston, Peter N.; Winwick, Thomas; Morley, John O. Journal of the Chemical Society, Chemical Communications, 1983 , # 2 p. 89 - 90

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Citation Number: 5

Abstract

Methoxyanthraquinone derivatives react with boron trifluoride–diethyl ether to give mono- and bis-difluoroboron chelates which, in methanol, are converted into hydroxyanthraquinones; an extension of this method is described for the synthesis of 2- hydroxy-2′, 4, 4′-trimethoxybenzophenone.