A Thioxanthone Sensitizer with a Chiral Phosphoric Acid Binding Site: Properties and Applications in Visible Light‐Mediated Cycloadditions
John Wiley and Sons Inc. -- Chemistry (Weinheim an Der Bergstrasse, Germany)
DOI 10.1002/chem.202000720
Keyword(s)
  1. enantioselectivity
  2. hydrogen bonds
  3. organocatalysis
  4. photochemistry
  5. sensitizers
Abstract(s)
Bind me tender: Cyclic enone‐3‐carboxylic acids (X=CH2, O) display a binding motif (in blue) for an assembly with chiral acid 1. The acid acts as photocatalyst by transferring the energy of visible photons to the substrate via its thioxanthone substituents (in yellow) enabling an enantioselective [2+2] photocycloaddition (see scheme).