Lanthanide Bis[(trifluoromethyl)sulfonyl]imides as Reusable Catalysts for Mononitration of Substituted Benzenes in Ionic Liquids
Lanthanide Bis[(trifluoromethyl)sulfonyl]imides as Reusable Catalysts for Mononitration of Substituted Benzenes in Ionic Liquids
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DOI：
10.1002/adsc.200900243
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发表时间：
2009-08
影响因子：
5.4
通讯作者：
Shuojin Wang;Shaojie Jiang;J. Nie
中科院分区：
文献类型：
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作者：
Shuojin Wang;Shaojie Jiang;J. Nie
将镧系双[（三氟甲基）磺酰]亚胺作为一种有效催化剂应用于季铵离子液体中，为浓硝酸（95%）作为硝化剂硝化取代苯提供了一种有用的新方法。较便宜的镧-二[（三氟甲基）磺酰基]亚胺是离子液体三丁基铵-二[（三氟甲基）磺酰基]亚胺中最有效的催化剂。镧-二[（三氟甲基）磺酰]亚胺/三丁基铵-二[（三氟甲基）磺酰]亚胺体系对卤代苯的硝化反应表现出较高的催化活性，并取得了良好的收率。该催化剂/离子液体体系可通过简单的程序回收，至少可循环5次。
Lanthanide bis[(trifluoromethyl)sulfonyl]-imides as a kind of effective catalyst were used in quaternary ammonium ionic liquids to afford a useful new method for the nitration of substituted benzenes with concentrated nitric acid (95%) as nitrating agent. The less expensive lanthanum bis[(trifluoromethyl)sulfonyl]imide was found to be the most effective catalyst employed in the ionic liquid tributylammonium bis[(trifluoromethyl)sulfonyl]-imide. The lanthanum bis[(trifluoromethyl)sulfonyl]-imide/tributylammonium bis[(trifluoromethyl)sulfonyl]imide system demonstrated high catalytic activity for the nitration of halobenzenes and rendered good to excellent yields. This catalyst/ionic liquid system could be recovered by simple procedures and recycled for at least 5 times.