The past 20 years have witnessed an explosion in research in the area of stable carbenes.
From laboratory curiosities, they have emerged as a front-line alternative to phosphines
in metal catalysis. The range of reactivity that they enable in organocatalysis, much
of it through their capability to render functional groups umpolung, is enviable.
Of course, their unique properties enable them to outperform both phosphines and more
traditional Lewis bases in specific transformations. This Cluster assembles leaders
in the field that provide a brief introduction to the unique chemistry afforded by
these species.
Key words
N-heterocyclic carbenes - organocatalysis - ligands on metal - asymmetric transformation