Enantioselective [2+2] photocycloaddition of quinolone using a C1-symmetric chiral phosphoric acid as a visible-light photocatalyst

The enantioselective intra- and intermolecular [2 + 2] photocycloaddition of quinolone using a C-1-symmetric chiral phosphoric acid as a visible-light photocatalyst is developed. The thioxanthone chromophore on phosphoric acid plays an important role in both phototransformation and enantioselectivity.

Automated summary

In this study, an enantioselective intra- and intermolecular [2 + 2] photocycloaddition of quinolone using a C-1-symmetric chiral phosphoric acid as a visible-light photocatalyst was developed. The thioxanthone chromophore on the phosphoric acid played a crucial role in both phototransformation and enantioselectivity.