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Efficient Synthesis of Quinoxalines in the Ionic Liquid 1-n-Butylimidazolium Tetrafluoroborate ([Hbim]BF4) at Ambient Temperature

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Quinoxaline derivatives have been synthesized in excellent yields using an ionic liquid (IL) (viz., 1-n-butylimidazolium tetrafluoroborate) as a reaction medium as well as promoter from various 1,2-diketones and aryl-1,2-diamines. The process is general for the synthesis of quinoxaline derivatives from aromatic as well as aliphatic-1,2-diketones. The advantages of the present method are ambient reaction temperature, simplicity of operation, high yields of products, the recyclability of the IL, and ecofriendly nature of the reaction medium.
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Keywords: 1,2-diketones; Aryl-1,2-diamines; ionic liquid (IL); quinoxalines

Document Type: Research Article

Affiliations: Division of Organic Chemistry, National Chemical Laboratory, Pune, India

Publication date: 2008-01-01

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