Synfacts, Table of Contents Synfacts 2021; 17(09): 1041DOI: 10.1055/s-0040-1719967 Organo- and Biocatalysis Enantioselective [2+2] Photocycloaddition Catalyzed by Sensitizer-Modified Chiral Phosphoric Acid Contributor(s): Benjamin List , Luc M. Debie Recommend Article Abstract Buy Article Key words Key wordsphotocycloaddition - alkenes - chiral phosphoric acids - iminium ions - asymmetric catalysis - cyclobutanecarbaldehydes Full Text