Cover Picture: Complexity from Simplicity: Tricyclic Aziridines from the Rearrangement of Pyrroles by Batch and Flow Photochemistry (Angew. Chem. Int. Ed. 5/2013). Issue 5 (16th January 2013) - Maskill, Katie G.
Abstract Complex tricylic aziridines can be prepared from simple pyrroles by UV irradiation. In their Communication on page 1499 ff., K. I. Booker‐Milburn and co‐workers show that the reaction proceeds by a two‐stage photochemical sequence that involves [2+2] cycloaddition and rearrangement, and that the scale of the reaction can be increased using a customized FEP flow reactor.