Asymmetric cyclopropanation an electro-organocatalytic cascade.

We report an iminium ion-promoted, asymmetric synthesis of cyclopropanes an electrocatalytic, iodine-mediated ring closure. The mild, controlled electrochemical generation of electrophilic iodine species in catalytic quantities prevents organocatalyst deactivation, while also eliminating the need for halogenating reagents, thus simplifying traditional synthetic approaches.