Perovskite as Recyclable Photocatalyst for Annulation Reaction of N -Sulfonyl Ketimines.

A sustainable and cost-effective manner for the photocatalytic annulation reaction of N -sulfonyl ketimines with N -arylglycines to synthesize imidazolidine-fused sulfamidates (31 examples) by employing CsPbBr 3 as a heterogeneous photocatalyst has been developed. The catalyst CsPbBr 3 can be simply recovered from the reaction mixture and reused at least five times without an obvious reduction in its photocatalytic reactivity, exhibiting a high catalyst economic feature.