Electrophilic catalysis in nucleophilic substitution reactions in ionic liquids

被引：4
作者：
Cavazza, M [1 ]
Pietra, F [1 ]
机构：
[1] Univ Pisa, Dipartimento Chim & Chim Ind, I-56100 Pisa, Italy
来源：
TETRAHEDRON LETTERS | 2004年 / 45卷 / 18期
关键词：
D O I：
10.1016/j.tetlet.2004.03.050
中图分类号：
O62 [有机化学];
学科分类号：
070303 ; 081704 ;
摘要：
2-Chlorotropone was obtained from 2-tosyloxytropone in 88% yield in the recyclable ionic medium BMIMBF4/LiCl. That Li+ acts as a Lewis acid was proven by the lack of reactivity of 2-tosyloxytropone, under the above conditions, on replacing LiCl with NaCl or BMIMCl, or using BMIMCl alone, or a BMIMBF4/MeCN/KCl mixture. 2-Bromo- and 2-iodotropone were obtained along similar lines from LiBr or LiI, respectively, whereas LiF proved unreactive. (C) 2004 Elsevier Ltd. All rights reserved.
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页码：3633 / 3634
页数：2
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