ASYMMETRIC VISIBLE‐LIGHT PHOTOREDOX CATALYSIS

Visible light photocatalysis is now recognized as a cornerstone to drive radical-based transformations with good efficiency and versatility under environmentally friendly reaction conditions. However, the high reactivity of photogenerated intermediates imparts several challenges for controlling the stereoselectivity of the process. This chapter provides an overview on the major achievements in asymmetric photoredox catalysis. Specifically, two major types of enantioselective photocatalytic strategies are outlined. The first one involves the synergistic merger of an achiral photocatalyst with a chiral co-catalyst. This part is divided according to the mode of asymmetric catalysis including Lewis base catalysis, hydrogen-bond catalysis, Brønsted base or Brønsted acid catalyzes, Lewis acid catalysis and phase transfer catalysis. The second strategy deals with the employment of a single chiral organophotocatalyst or chiral organometallic photocatalyst.