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Chem Commun (Camb). 2005 Mar 21;(11):1474-5. Epub 2005 Jan 26.

A simple cobalt catalyst system for the efficient and regioselective cyclotrimerisation of alkynes.

Author information

  • 1Fachbereich Chemie, Philipps-Universitat Marburg, Hans-Meerwein-Strasse, 35032, Marburg, Germany. Hilt@chemie.uni-marburg.de

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.

PMID:
15756340
DOI:
10.1039/b417832g
[PubMed]
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