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The persistent radical effect in organic synthesis.

A Studer1

  • 1Fachbereich Chemie der Universität Marburg, Germany. studer@mailer.uni-marburg.de

Chemistry (Weinheim an Der Bergstrasse, Germany)
|April 27, 2001
PubMed
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The persistent radical effect (PRE) enables selective cross-coupling reactions. This principle is applied in various organic synthesis reactions, including radical additions, cyclizations, and Kharasch reactions, with future perspectives discussed.

Area of Science:

  • Organic Chemistry
  • Radical Chemistry

Background:

  • The persistent radical effect (PRE) describes selective cross-coupling between persistent and transient radicals formed at equal rates.
  • Understanding PRE is crucial for controlling radical reaction selectivity.

Purpose of the Study:

  • To discuss the principle of the persistent radical effect (PRE).
  • To present diverse applications of PRE in various organic synthesis reactions.
  • To offer future perspectives on PRE in organic synthesis.

Main Methods:

  • Literature review and conceptual discussion of the persistent radical effect (PRE).
  • Presentation of PRE applications in Co-mediated radical addition/cyclization, transition metal-catalyzed Kharasch reactions, Barton reaction, and nitroxide-mediated tin-free radical cyclizations.

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Main Results:

  • The persistent radical effect (PRE) is a key principle for achieving high selectivity in radical cross-coupling reactions.
  • PRE has been successfully applied across a range of synthetic methodologies, demonstrating its versatility.
  • Specific examples include Co-mediated reactions, Kharasch-type reactions, Barton reactions, and novel tin-free cyclizations.

Conclusions:

  • The persistent radical effect (PRE) is a powerful and versatile principle in radical chemistry.
  • Its application spans various named reactions and synthetic strategies, highlighting its broad utility.
  • Future research directions for PRE in organic synthesis are promising.