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首页> 外文期刊>Comptes Rendus Chimie >Bronsted acidic ionic liquids promoted cyclocondensation reaction: Synthesis of 1,8-dioxo-octahydroxanthene
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Bronsted acidic ionic liquids promoted cyclocondensation reaction: Synthesis of 1,8-dioxo-octahydroxanthene

机译：布朗斯台德酸性离子液体促进环缩合反应：1,8-二氧-八氢氧杂蒽的合成

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摘要

Novel Bronsted acidic ionic liquids bearing hydrogen sulfate and dihydrogen phosphate as anions were designed and successfully applied as catalysts for the one-pot synthesis of 1,8-dioxo-octahydroxanthene in water medium. The sequence of the catalytic activity observed in the transformation was in good agreement. In this article, six different ionic liquids (ILs) such as, [BMIM][BF4], [CMIM][HSO4], [NMP][HSO4], [BMIM][HSO4], [(CH2)4SO3H1VII1VI][HSO4], [BMIM][H2PO4] were synthesized and used as a catalyst for synthesis of 1,8-dioxo-octahydroxanthene very first time. The products could be conveniently separated from the reaction mixture by filtration and the dissolved catalyst can be regenerated and recycled several times without significant loss of activity.
机译：设计了以硫酸氢盐和磷酸二氢盐为阴离子的新型布朗斯台德酸性离子液体，并将其成功地用作在水介质中一锅法合成1,8-二氧代-八氢氧杂蒽的催化剂。在转化中观察到的催化活性的顺序非常一致。本文中的六种不同离子液体（IL），例如[BMIM] [BF4]，[CMIM] [HSO4]，[NMP] [HSO4]，[BMIM] [HSO4]，[（CH2）4SO3H1VII1VI] [HSO4合成[BMIM] [H2PO4]，并首次将其用作合成1,8-二氧代-八氢氧杂蒽的催化剂。可以通过过滤方便地从反应混合物中分离出产物，并且可以将溶解的催化剂再生和再循环数次而没有明显的活性损失。

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