Abstract
Palladacycles containing tridentate ligands have become a very promising family of complexes due to an excellent balance between stability and reactivity that enables them to catalyze a number of organic reactions. Moreover, special chemical properties of such interesting compounds have been considered as keys to determine the mechanisms of many palladium-catalyzed reactions. Although the most commonly employed are those with two identical donor groups, that is, symmetrical pincers, the interest in the preparation and synthetic applications of unsymmetrical ones has considerably increased because the presence of two different donor groups provides them unique properties and reactivity. In fact, high efficiency in terms of outstanding turnover numbers and frequencies has been achieved by using this emerging class of palladacycles. In this article it is projected to compile the advances achieved in the synthesis and catalytic applications of unsymmetrical palladium pincer complexes with a special focus on cross-coupling reactions, the processes in which the catalytic activity of such specially designed catalysts has been mainly evaluated.
Call for Papers in Thematic Issues
Catalytic C-H bond activation as a tool for functionalization of heterocycles
The major topic is the functionalization of heterocycles through catalyzed C-H bond activation. The strategies based on C-H activation not only provide straightforward formation of C-C or C-X bonds but, more importantly, allow for the avoidance of pre-functionalization of one or two of the cross-coupling partners. The beneficial impact of ...read more
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