期刊
TETRAHEDRON
卷 69, 期 27-28, 页码 5660-5664出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2013.04.031
关键词
Direct arylation; Recyclable magnetic nanoparticles; Pd-Fe3O4; Imidazo[1,2-a]pyridine; Aryl bromides
资金
- BRL (Basic Research Laboratory) program of the NRF (National Research Foundation) of Korea
The direct C-H arylation of a heteroarene with aryl bromides has been achieved under the catalysis of magnetic nanoparticles. In the presence of bimetallic Pd-Fe3O4 heterodimer nanocrystals (1 mol % in palladium), the reaction of imidazo[1,2-a]pyridine with various aryl bromides gives the corresponding arylated products with exclusive C3-selectivity. The highly regioselective method is applicable to a wide range of aryl bromides with varying electronic and steric properties. The Pd-Fe3O4 nanocrystals can be recoverable by simple magnetic separation and have been recycled ten times without loss of catalytic activity. (C) 2013 Elsevier Ltd. All rights reserved.
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