New catalysts with unsymmetrical N-heterocyclic carbene ligands

Dalton Transactions : an International Journal of Inorganic Chemistry
Johanna TornatzkySiegfried Blechert

Abstract

The importance of unsymmetrical N-heterocyclic carbenes (uNHCs) as ligands in metal-catalyzed reactions is undeniable. While uNHCs show similar properties as compared with symmetrical NHCs, dissymmetrization allows for further fine-tuning. The introduction of chelatization, hemilability, bifunctionality, shielding effects, and chirality-transfer influences the catalyst's stability, reactivity, and selectivity, thus offering access to tailor-made systems including mono- and multidentate uNHC ligands. Based on selected examples, the structure-reactivity relationship of uNHCs employed in metal catalysts is presented. The focus is on catalytically active complexes, which either offer access to new applications or lead to significantly improved results in metal-catalyzed reactions.

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Citations

Mar 22, 2014·Dalton Transactions : an International Journal of Inorganic Chemistry·Mathieu RouenMarc Mauduit
Aug 16, 2013·Dalton Transactions : an International Journal of Inorganic Chemistry·Tamal K SenDebasis Koley
Jan 26, 2016·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Veronica ParadisoFabia Grisi
Mar 17, 2017·Chemistry : a European Journal·Maxim A TopchiySergey N Osipov
Feb 7, 2015·Chemical Communications : Chem Comm·Elisa IvryN Gabriel Lemcoff
Nov 27, 2015·Dalton Transactions : an International Journal of Inorganic Chemistry·Veronica ParadisoFabia Grisi
Mar 13, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Mark R D GatusBarbara A Messerle
Jan 19, 2013·Dalton Transactions : an International Journal of Inorganic Chemistry·Sylvain Gaillard, Jean-Luc Renaud
Jan 16, 2019·Beilstein Journal of Organic Chemistry·Veronica ParadisoFabia Grisi
Nov 20, 2016·Angewandte Chemie·Samaresh Chandra SauSwadhin K Mandal
Jan 16, 2014·Dalton Transactions : an International Journal of Inorganic Chemistry·Stefan RittinghausUlrich Siemeling
May 16, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Michał PieczykolanKarol Grela
Nov 11, 2020·Chemistry : a European Journal·Hyunho KimEunsung Lee
Jun 20, 2021·Chemical Record : an Official Publication of the Chemical Society of Japan ... [et Al.]·Louis MonsignyKarol Grela

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