Abstract
Irradiation of Cp(2) TiCl(2) with green light leads to electronically excited [Cp(2) TiCl(2) ]*. This complex constitutes an efficient photoredox catalyst for the reduction of epoxides and for 5-exo cyclizations of suitably unsaturated epoxides. To the best of our knowledge, our system is the first example of a molecular titanium photoredox catalyst.