alkyne metathesis



Bei der Alkinmetathese handelt es sich um eine organische Reaktion, in der Substituenten an einer alkinischen Dreifachbindungen ausgetauscht werden. Die Reaktion ist eng verwandt mit der Alkenmetathese. Die Metall-katalysierte Alkinmetathese wurde zuerst von Bailey et al. 1968 beschrieben. Die Arbeitsgruppe
Alkyne metathesis is an organic reaction involving the redistribution of alkyne chemical bonds. This reaction is closely related to olefin metathesis. Metal-catalyzed alkyne metathesis was first described in 1968 by Bailey, et al. The Bailey system utilized a mixture of tungsten and silicon oxides at temperatures as high as 450
Alkyne metathesis has been a useful tool for C–C bond formation since the discovery of structurally well-defined metal alkylidynes by Schrock and coworkers. These complexes have found use in the synthesis of complex natural products and in material science. The limitations of these catalysts include air- and
25.01.2013 -
Alkyne Metathesis: Catalysts and Synthetic Applications. Wei Zhanga and Jeffrey S. Mooreb,* a Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA b Roger Adams Laboratory, Department of Chemistry and Materials Science & Engineering, University of Illinois at.
1968, 1548. (supported tungsten oxide, 200-450°C). A. Mortreux et al., Chem. Commun. 1974, 786. (Mo(CO)6 + phenol, > 130°C) mechanism: T. J. Katz et al., JACS 1975, 97, 1592 first example of alkyne metathesis using defined alkylidyne complexes, e. g. (tBuO)3W≡CCMe3: R. R. Schrock et al., JACS 1981, 103, 3932
28.03.2005 -
19.01.2011 -
Since its discovery in the 1960's, olefin metathesis has been developed to a well established and powerful synthetic tool in organic chemistry and polymer science (1). In contrast, the related alkyne metathesis that involves the breaking and making of carbon- carbon triple instead of double bonds, has been much less.
this emerging field rather than as a comprehensive review. Classical catalyst systems for alkyne metathesis. Alkyne metathesis refers to the mutual exchange of the alkylidyne units between a pair of (non-terminal) acetylene derivatives. The first effective catalyst described in the literature consists of a heterogeneous mixture

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