Independence from the Sequence of Single-Electron Transfer of Photoredox Process in Redox-Neutral Asymmetric Bond-Forming Reaction

A catalytic cycle initiated by the oxidative quenching of the excited photosensitizer (Ir*­(ppy)3) is established for the enantioselective coupling between (N-arylamino)­methanes and (N-methanesulfonyl)­aldimines catalyzed by Ir-based photosensitizer and a chiral (arylamino)­phosphonium tetrakis­[3,5-bis­(trifluoromethyl)­phenyl]­borate under visible light irradiation. This achievement clearly demonstrates the insensitivity of this redox-neutral asymmetric reaction to the sequence of the key redox events involved in the synergistic catalysis.