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This method produces flavones efficiently in an ionic liquid, suggesting potential for greener chemistry applications.
A concise one-pot process for producing flavones and 2-alkyl-4H-benzopyran-4-one from a variety of salicylic acylbenzotriazoles is described. The in situ generation of o-(alkynon-1-yl)phenols in the ionic liquid 1-butyl-3-methylimidazoliumtetrafluoroborate ([BMIM][BF4]) is also described in this work. Three rounds of usage of the ionic liquid are possible without a noticeable decrease in efficiency.
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Khalid Widyan (2025) studied this question.
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