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A Thioxanthone Sensitizer with a Chiral Phosphoric Acid Binding Site: Properties and Applications in Visible Light‐Mediated Cycloadditions

Pecho, F. ; Zou, Y,-Q. ; Gramüller, J. ; Mori, T. ; Huber, S. M. ; Bauer, A. ; Gschwind, Ruth M. ; Bach, T.



Zusammenfassung

A chiral phosphoric acid with a 2,2'-binaphthol core was prepared that displays two thioxanthone moieties at the 3,3'-position as light-harvesting antennas. Despite its relatively low triplet energy, the phosphoric acid was found to be an efficient catalyst for the enantioselective intermolecular [2+2] photocycloaddition of beta-carboxyl-substituted cyclic enones (e.r. up to 93:7). Binding of the ...

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