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Dipl.-Chem. Birte Haberlag, Dr. Matthias Freytag, Dr. Constantin G. Daniliuc, Prof. Dr. Peter G. Jones and Prof. Dr. Matthias Tamm Efficient Metathesis of Terminal Alkynes Angewandte Chemie International Edition 51

Article first published online: 14 NOV 2012 | DOI: 10.1002/anie.201207772

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Now even terminal: The 2,4,6-trimethylbenzylidyne complexes [MesC[TRIPLE BOND]M{OC(CF3)2Me}3] (M=Mo, W) were synthesized from [Mo(CO)6] and [W(CO)6], respectively. The molybdenum complex is an efficient catalyst for the metathesis of internal and terminal alkynes and also for the ring-closing metathesis of internal and terminal α,ω-diynes at room temperature and low catalyst concentrations.

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