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 alpha,beta-unsaturated N-acyl oxazolidinones by merging photocatalysis and Lewis acid catalysis.