A Route toward (Aminomethyl)cyclopentadienide Ligands and Their Group 4 Metal Complexes

Abstract

A new method is described, by which N-functionalized cyclopentadienide ligands are synthesized via the nucleophilic substitution of sodium cyclopentadienide onto Katritzky's (benzotriazolyl) compounds. This route enables the introduction of bulky and basic amines, separated from the cyclopentadienyl ring by a methylene spacer. The method thus represents a valuable alternative to the general fulvene route. The resulting ligands have been coordinated to titanium and zirconium, pro- [a]