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chiral catalyst

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  • Chiral Lewis acid — Chiral Lewis acids (CLAs) are a novel class of Lewis acid catalyst used in enantioselective asymmetric synthesis reactions which produce optically active products from optically inactive or impure starting materials. This type of preferential… …   Wikipedia

  • Chiral ligand — In chemistry a chiral ligand is a specially adapted ligand used for asymmetric synthesis. This ligand is an enantiopure organic compound which combines with a metal center by chelation to form an asymmetric catalyst. This catalyst engages in a… …   Wikipedia

  • Wilkinson's catalyst — Chembox new ImageFile = Wilkinson s catalyst 2D.png ImageSize = 200px ImageName = Wilkinson s catalyst ImageFile1 = Wilkinson s catalyst no hydrogens 3D balls.png ImageSize1 = 120px ImageName1 = Wilkinson s catalyst ImageFile2 = Wilkinson s… …   Wikipedia

  • Ziegler-Natta catalyst — A Ziegler Natta catalyst is a reagent or a mixture of reagents used in the production of polymers of 1 alkenes (α olefins). Ziegler Natta catalysts are typically based on titanium compounds and organometallic aluminium compounds, for example… …   Wikipedia

  • CBS catalyst — Corey Bakshi Shibata catalyst The CBS catalyst or Corey Bakshi Shibata catalyst is an asymmetric catalyst derived from proline. It finds many uses in organic reactions such as the CBS reduction, Diels Alder reactions and [3+2] cycloadditions.… …   Wikipedia

  • Crabtree's catalyst — Crabtree s catalyst …   Wikipedia

  • Bifunctional catalyst — A catalyst with two contrasting functional components often a Lewis acid and Lewis base. Overview The broadest description of the most common definition of a bifunctional catalyst is a catalyst that contains Lewis acidic and Lewis basic component …   Wikipedia

  • Kaminsky catalyst — A Kaminsky catalyst is a catalytic system for alkene polymerization discovered in 1980. Kaminsky catalysts are based on metallocenes of group 4 transition metals with methylaluminoxane (MAO). These catalysts are a type of Ziegler Natta catalyst,… …   Wikipedia

  • Organocatalysis — Justus von Liebig s synthesis of oxamide from dicyan and water represents the first organocatalytic reaction, with acetaldehyde further identified as the first discovered pure organocatalyst , which act similarly to the then named ferments , now… …   Wikipedia

  • Nobel Prizes — ▪ 2009 Introduction Prize for Peace       The 2008 Nobel Prize for Peace was awarded to Martti Ahtisaari, former president (1994–2000) of Finland, for his work over more than 30 years in settling international disputes, many involving ethnic,… …   Universalium

  • Electrophilic aromatic substitution — or EAS is an organic reaction in which an atom, usually hydrogen, appended to an aromatic system is replaced by an electrophile. The most important reactions of this type that take place are aromatic nitration, aromatic halogenation, aromatic… …   Wikipedia

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