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Copper-Catalyzed Coupling Reactions Using Carbon
Copper-Catalyzed Coupling Reactions Using Carbon

... incorporate the use of C-H bonds as substrates for C-C bond formation processes. In this chapter, a concise review of oxidative cross-coupling reactions relevant to this thesis will be presented. Furthermore, the examples will be focused heavily on the use of organic peroxides as the oxidant, with s ...
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Chemical Reactivity and Biological Activity of Diketene
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... Which of the following is a true statement about chemical equilibria in general? A. At equilibrium the total concentration of products equals the total concentration of reactants, that is, [products] = [reactants]. B. Equilibrium is the result of the cessation of all chemical change. C. There is onl ...
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... Count the number of red elements before the reaction. Count the number of red elements after the reaction. Count the number of blue elements before the reaction. Count the number of blue elements after the reaction. Compare the number of red elements before and after the reaction. Compare the number ...
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Asymmetric induction



Asymmetric induction (also enantioinduction) in stereochemistry describes the preferential formation in a chemical reaction of one enantiomer or diastereoisomer over the other as a result of the influence of a chiral feature present in the substrate, reagent, catalyst or environment. Asymmetric induction is a key element in asymmetric synthesis.Asymmetric induction was introduced by Hermann Emil Fischer based on his work on carbohydrates. Several types of induction exist.Internal asymmetric induction makes use of a chiral center bound to the reactive center through a covalent bond and remains so during the reaction. The starting material is often derived from chiral pool synthesis. In relayed asymmetric induction the chiral information is introduced in a separate step and removed again in a separate chemical reaction. Special synthons are called chiral auxiliaries. In external asymmetric induction chiral information is introduced in the transition state through a catalyst of chiral ligand. This method of asymmetric synthesis is economically most desirable.
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