Synfacts, Table of Contents Synfacts 2026; 22(01): 74DOI: 10.1055/a-2738-9556 Organo- and Biocatalysis A Sensitizer-Free [2+2] Photocycloaddition via Iminium Ion Catalysis Authors Contributor(s): Benjamin List Michiel J. van Well Recommend Article Abstract Buy Article(opens in new window)Keywords Keywords3-carboxyl-indoles - [2+2] photocycloaddition - triplet-state reactivity - photoactive iminium ions Full Text