the rapidly expanding field of photocatalysis, the development of enantioselective transformations remains challenging due to the high reactivity and transient nature of photo-excited intermediates. A particular challenge in this area is the suppression of uncatalyzed background processes that give rise to undesired racemic product. To tackle this problem, creative strategies have been developed such as utilizing chiral Lewis acid catalysis in conjuncture with a separate photocatalyst or via direct excitation of the substrate. Within these strategies, the role of the chiral Lewis acid for the enantioselectivity of the photocatalyzed reaction can be manifold as has been elegantly shown by pioneering work of the groups of Bach 4 , Yoon 5 and Meggers. One such mode of enantioinduction via a chiral Lewis acid was shown by the Bach group in the [2+2] photocycloaddition of enones (Scheme 1A). In this example, coordination of chiral Lewis acid LA1 to the substrate results in a change in the substrate's absorption properties and leads to a red shift by lowering the energy of the LUMO, rendering an uncoordinated racemic background reaction less feasible as compared to excitation of the chiral Lewis acid substrate complex. While this strategy relies on direct excitation of the substrate, the work of Yoon introduced the use of a chiral Lewis acid for enantioselective triplet energy-transfer catalysis that proceeds with a discrete photocatalyst separate from the Lewis acid (Scheme 1B). In this case, the coordination of the chiral Lewis acid complex to 2′-hydroxychalcones causes a significant lowering of the triplet energy of the substrate, allowing for selective excitation and subsequent enantioselective control. Scheme 1: Chiral Lewis acid catalysis for enantioselective photocatalysis.