期刊
TETRAHEDRON
卷 63, 期 4, 页码 986-990出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2006.11.013
关键词
ionic liquid; Michael addition; N-heterocycle; alpha,beta-unsaturated compounds
A fast and green protocol for the Michael addition of N-heterocycles to alpha,beta-unsaturated compounds at room temperature was developed using a basic ionic liquid, 1-methyl-3-butylimidazolium hydroxide, [bmlm]OH, as a catalyst and a reaction medium. The reactions were performed at room temperature with good yields in short reaction times (0.5-3 h). This strategy is quite general and it works with a broad range of N-heterocycles, including five-membered N-heterocycles, pyrimidines and purines. The recovered ionic liquid could be reused for several cycles with consistent activity. (c) 2006 Elsevier Ltd. All rights reserved.
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