A simple electrochemical protocol is established for the selective alkene dibromination of naturally derived olefins, such as terpenes. The use of hazardous Br 2 or its analogues have been elegantly avoided by employing readily available, inexpensive, and harmless sodium bromide with a dual role as reagent and supporting electrolyte in combination with sustainable carbon-based electrodes. This electrochemical protocol provides the desired products with good to excellent yields up to 82 % with 10 examples. Scalability has been proved by a 5fold scale-up. Notably, higher yields and selectivity were achieved in comparison to conventional bromination by Br 2 and DMSO/HBr system and the dibrominated compound was eligible for further functionalization, such as cyanation according to the Kolbe nitrile synthesis protocol.

The Front Cover illustrates the contrast between conventional and electrochemical bromination in terms of sustainability and safety. In the background on the left, hazardous bromine represents the conventional brominating agents. On the right, sodium bromide represents a safer and sustainable bromine surrogate, which can be electrochemically generated in situ for the bromination of renewable entities, such as limonene. The green electricity plug demonstrates the superiority of electrochemistry by providing a greener alternative to the conventional bromination methods with high selectivity. Cover design by M. Dörr and L. Gombos. More information can be found in the Research Article by S. R. Waldvogel et al.