Visible light photocatalytic asymmetric synthesis of pyrrolo[1,2- a ]indoles via intermolecular [3+2] cycloaddition

The intermolecular diastereoselective and enantioselective synthesis of pyrrolo[1,2-a]indoles is developed through a [3+2] cycloaddition between silyl-indole derivatives and α,β-unsaturated N-acyl oxazolidinones by merging photocatalysis and Lewis acid catalysis.