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Coupling reaction

In organic chemistry, a coupling reaction is a type of reaction in which two reactant molecules are bonded together. Such reactions often require the aid of a metal catalyst. In one important reaction type, a main group organometallic compound of the type R-M (where R = organic group, M = main group centre metal atom) reacts with an organic halide of the type R'-X with formation of a new carbon-carbon bond in the product R-R'. The most common type of coupling reaction is the cross coupling reaction.[1][2][3]

Richard F. Heck, Ei-ichi Negishi, and Akira Suzuki were awarded the 2010 Nobel Prize in Chemistry for developing palladium-catalyzed cross coupling reactions.[4][5]

Broadly speaking, two types of coupling reactions are recognized:

  • Homocouplings joining two identical partners. The product is symmetrical R−R
  • Heterocouplings joining two different partners. These reactions are also called cross-coupling reactions.[6] The product is unsymmetrical, R−R'.
  1. ^ Organic Synthesis using Transition Metals Rod Bates ISBN 978-1-84127-107-1
  2. ^ New Trends in Cross-Coupling: Theory and Applications Thomas Colacot (Editor) 2014 ISBN 978-1-84973-896-5
  3. ^ King, A. O.; Yasuda, N. (2004). "Palladium-Catalyzed Cross-Coupling Reactions in the Synthesis of Pharmaceuticals". Organometallics in Process Chemistry. Topics in Organometallic Chemistry. Vol. 6. Heidelberg: Springer. pp. 205–245. doi:10.1007/b94551. ISBN 978-3-540-01603-8.
  4. ^ "The Nobel Prize in Chemistry 2010 - Richard F. Heck, Ei-ichi Negishi, Akira Suzuki". NobelPrize.org. 2010-10-06. Retrieved 2010-10-06.
  5. ^ Johansson Seechurn, Carin C. C.; Kitching, Matthew O.; Colacot, Thomas J.; Snieckus, Victor (2012). "Palladium-Catalyzed Cross-Coupling: A Historical Contextual Perspective to the 2010 Nobel Prize". Angewandte Chemie International Edition. 51 (21): 5062–5085. doi:10.1002/anie.201107017. PMID 22573393.
  6. ^ Smith, Michael B.; March, Jerry (2007), Advanced Organic Chemistry: Reactions, Mechanisms, and Structure (6th ed.), New York: Wiley-Interscience, p. 449, ISBN 978-0-471-72091-1
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