A simple cobalt catalyst system for the efficient and regioselective cyclotrimerisation of alkynes |
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| Authors: | Hilt Gerhard Vogler Thomas Hess Wilfried Galbiati Fabrizio |
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| Affiliation: | Fachbereich Chemie, Philipps-Universitat Marburg, Hans-Meerwein-Strasse, 35032, Marburg, Germany. Hilt@chemie.uni-marburg.de |
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| Abstract: | The intermolecular cyclotrimerisation of terminal and internal alkynes can be catalysed by simple cobalt complexes such as a CoBr2(diimine) under mild reaction conditions when treated with zinc and zinc iodide with high regioselectivity in excellent yields. |
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