Modularly designed transition metal PNP and PCP pincer complexes based on aminophosphines: synthesis and catalytic applications

Accounts of Chemical Research
David Benito-Garagorri, Karl Kirchner

Abstract

Transition metal complexes are indispensable tools for any synthetic chemist. Ideally, any metal-mediated process should be fast, clean, efficient, and selective and take place in a catalytic manner. These criteria are especially important considering that many of the transition metals employed in catalysis are rare and expensive. One of the ways of modifying and controlling the properties of transition metal complexes is the use of appropriate ligand systems, such as pincer ligands. Usually consisting of a central aromatic backbone tethered to two two-electron donor groups by different spacers, this class of tridentate ligands have found numerous applications in various areas of chemistry, including catalysis, due to their combination of stability, activity, and variability. As we focused on pincer ligands featuring phosphines as donor groups, the lack of a general method for the preparation of both neutral (PNP) and anionic (PCP) pincer ligands using similar precursor compounds as well as the difficulty of introducing chirality into the structure of pincer ligands prompted us to investigate the use of amines as spacers between the aromatic ring and the phosphines. By introduction of aminophosphine and phosphoramidite moieties...Continue Reading

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Citations

Nov 10, 2012·Inorganic Chemistry·Shanish KumarPratim Kumar Chattaraj
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Mar 8, 2011·Dalton Transactions : an International Journal of Inorganic Chemistry·Jun-Long NiuMao-Ping Song
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