N-heterocyclic carbene - Open Access .click

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2010
Over the last fifteen years, N-heterocyclic carbenes (NHCs) have mostly been used as ancillary ligands for the preparation of transition metal-based catalysts. Compared to phosphorus-containing ligands, NHCs tend to bind more strongly to metal centres, avoiding the necessity for the use of excess ligand in catalytic reactions.
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N-Heterocyclic Carbene Boryl Iodides Catalyze Insertion Reactions of N-Heterocyclic Carbene Boranes and Diazoesters

Organic Letters, 2017
Boron-hydrogen bond insertion reactions of N-heterocyclic carbene (NHC) boranes and diazoesters can be catalyzed by NHC-boryl iodides and produce stable α-NHC-boryl esters. The conditions of the reaction resemble the previous rhodium-catalyzed transformations (only the catalyst is different); however, the mechanisms of the two reactions are probably ...
Thomas H. Allen +4 more
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N-Heterocyclic Carbenes in Organocatalysis

2010
The use of N-heterocyclic carbenes (NHCs) to promote organocatalytic transformations has rapidly expanded in recent years, building upon the classic use of these compounds to generate acyl anion equivalents from aldehydes. This chapter gives an overview of the recent progress made in this area, describing the use of NHCs to generate synthetic ...
Craig D. Campbell, Kenneth B. Ling, Andrew D. Smith +2 more
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Organocatalysis by N-Heterocyclic Carbenes