Z Zhang

Selective Control of Photocatalytic [2 + 2] Cycloaddition versus Isomerization Using Anthraquinone Photosensitizers

Designed anthraquinone photosensitizers enable selective switching between chalcone [2 + 2] cycloaddition and E/Z isomerization. The α-trifluoromethyl group drives isomerization (5:95), whereas the β-tert-butyl group with polychloro substituents promotes cycloaddition (98% yield)...