期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 15, 期 12, 页码 2810-2817出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.200802191
关键词
click chemistry; copper; cycloaddition; heterogeneous catalysis; zeolites
Copper(I)-exchanged zeolites were used as heterogeneous ligand-free catalysts for [3+2] cycloaddition of azomethine ylides, which allows versatile, efficient, and highly regioselective synthesis of pyrazolone derivatives. These cheap and easy-to-prepare catalysts exhibit wide scope and compatibility with functional groups. They are very simple to use, easy to remove (by simple filtration), and recyclable (up to six times without loss of activity)
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