期刊
TETRAHEDRON LETTERS
卷 43, 期 33, 页码 5793-5795出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0040-4039(02)01185-1
关键词
indole; acylation; imidazolium chloroaluminate; ionic liquid
A practical and convenient protocol has been developed for the acidic 1-ethyl-3-methylimidazolium chloroaluminate ionic liquid (generated from 1-ethyl-3-methylimidazolium chloride (EmimCl) and aluminium chloride (X(AlCl3), mole fraction X=0.67 0.75) promoted Friedel Crafts acylation of indoles at room temperature. The simple experimental procedure provides 3-substituted indoles in good to high yields with less electron rich indole ring systems. (C) 2002 Elsevier Science Ltd. All rights reserved.
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