Electrochemical Cyclopropanation of 1,3-Dialkyl Bromides

An electrochemical synthesis of mono- and 1,1-disubstituted cyclopropanes is demonstrated. Starting from readily available 1,3-dialkyl bromides, this method hinges on the integration of a sacrificial reductant alongside cost-effective cathode and anode materials. The refined approach eliminates the necessity for a divided cell and the use of hazardous or costly electrodes, thereby streamlining the transition of this protocol to a continuous flow system. In addition, an alternative protocol that utilizes a simple sacrificial anode is also described.