3.27 Stoichiometric Auxiliary Ligands for Metals and Main Group Elements: Ligands for Titanium and Zirconium Complexes

Abstract

Chiral titanium and zirconium complexes are usually easily formed by the combination of a metal source and the corresponding chiral ligand. There are different types of ligands, in terms of denticity, that can coordinate titanium or zirconium in order to form the corresponding complex. In this chapter, diverse ligands for titanium and zirconium have been classified as mono-, bi-, tri-, and tetradentate. Moreover, some of the most representative asymmetric transformations employing different chiral titanium and zirconium complexes, which can be prepared by mixing the corresponding ligand with a metal source, have been described. For each reaction, there is a type of ligand which forms the most active and selective complex.