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- W2945587946 endingPage "108" @default.
- W2945587946 startingPage "74" @default.
- W2945587946 abstract "Abstract Radical–radical couplings are mostly nearly diffusion‐controlled processes. Therefore, the selective cross‐coupling of two different radicals is challenging and not a synthetically valuable transformation. However, if the radicals have different lifetimes and if they are generated at equal rates, cross‐coupling will become the dominant process. This high cross‐selectivity is based on a kinetic phenomenon called the persistent radical effect (PRE). In this Review, an explanation of the PRE supported by simulations of simple model systems is provided. Radical stabilities are discussed within the context of their lifetimes, and various examples of PRE‐mediated radical–radical couplings in synthesis are summarized. It is shown that the PRE is not restricted to the coupling of a persistent with a transient radical. If one coupling partner is longer‐lived than the other transient radical, the PRE operates and high cross‐selectivity is achieved. This important point expands the scope of PRE‐mediated radical chemistry. The Review is divided into two parts, namely 1) the coupling of persistent or longer‐lived organic radicals and 2) “radical–metal crossover reactions”; here, metal‐centered radical species and more generally longer‐lived transition‐metal complexes that are able to react with radicals are discussed—a field that has flourished recently." @default.
- W2945587946 created "2019-05-29" @default.
- W2945587946 creator A5019611453 @default.
- W2945587946 creator A5090922097 @default.
- W2945587946 date "2019-10-31" @default.
- W2945587946 modified "2023-10-11" @default.
- W2945587946 title "The Persistent Radical Effect in Organic Synthesis" @default.
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