Journal
JOURNAL OF ORGANOMETALLIC CHEMISTRY
Volume 696, Issue 24, Pages 3906-3908Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jorganchem.2011.08.041
Keywords
Alkynes; Catalysis; Cobalt; Cycloadditions; Ruthenium
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Funding
- UPMC
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Alkynyl chlorides, bromides, and iodides have been tested as [2 + 2 + 2] cycloaddition partners using CpCo(CO)(dimethylfumarate) and Cp*Ru(cod)Cl as precatalysts. A series of cocyclizations between diynyl dihalides and alkynes, as well as intramolecular cycloadditions of triynyl dihalides, has been carried out. While this study confirmed the versatility of the ruthenium complex with all kinds of halides, the cheap air-stable cobalt complex proved nonetheless efficient with alkynyl bromides. (C) 2011 Elsevier B.V. All rights reserved.
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