(Cp2TiCl)-Cl-III Catalysis in a New Light

Visible-light-mediated photogeneration of (Cp2TiCl)-Cl-III has opened new avenues for titanium catalysis. The synergistic utilization of dual photoredox and (Cp2TiCl)-Cl-III catalysis uses Hantzsch ester (HE) as an electron donor instead of traditional super-stoichiometric metallic reductants. This new paradigm has found numerous applications in synthetic organic chemistry. The highly efficient photoinduced electron transfer process between light-sensitive Cp(2)TiCl(2)and an excited photocatalyst is the key to the success of such a photocatalytic system and ensures overall catalyst turnover. Comparisons between the metal reduction approach and photo reduction approach have been made.