Titanacyclobutane Synthesis by Radical Alkylation of Substituted Allyl Complexes. The Use of Electron-Rich Bis(2-piperidinoindenyl)titanocene(III) Complexes to Control Allyl Ligand Reactivity

In contrast to reactions of the bis(pentamethylcyclopentadienyl)titanium system, substituted allyl complexes of the electron-rich bis(2-piperidinoindenyl)titanium(III) template are converted to 2,3-disubstituted titanacyclobutane complexes by free radical alkylation at the allyl central carbon.