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Article Abstract
The catalytic potential of copper(I)-exchanged zeolites was evaluated in the Ullmann-type synthesis of diaryl ethers. Among four investigated zeolites (i.e., USY, MOR, β, and ZSM5), Cu(I)-USY was the best catalyst and proved efficient under ligand-free conditions in toluene at 120 °C. Cu(I)-USY was also easy to recover and was recyclable up to five times without significant loss of activity.
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| http://dx.doi.org/10.1021/acs.orglett.5b02167 | DOI Listing |
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Click chemistry in CuI-zeolites: the Huisgen [3 + 2]-cycloaddition.
Org Lett
March 2007
Laboratoire de Physicochimie des Hydrocarbures, assosié au CNRS, and Laboratoire de Synthèse et Réactivité Organique, associé au CNRS, Institut de Chimie, Université L. Pasteur, 4 rue B. Pascal, 67000 Strasbourg, France.
[reaction: see text] CuI-exchanged solids based on zeolite materials were investigated for the first time as catalysts in organic synthesis. The catalytic potential of these materials was evaluated in the Huisgen [3 + 2]-cycloaddition. Five CuI-exchanged zeolites were examined and CuI-USY proved to be a novel and efficient heterogeneous ligand-free catalyst for this "click chemistry"-type transformation.
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