Electrochemical Selenylation‐Induced Annulation of Alkenyl Ureas to Access Cyclic Isoureas

A direct electrosynthesis of cyclic isoureas from N‐allyl ureas and diselenides has been described. This protocol proceeds without any additional catalyst and oxidant, mild reaction conditions, providing the desired products up to 91% yields. In addition, the synthesis of cyclic isoureas containing five to seven‐membered rings has also been achieved by the employment of this strategy. On the basis of the mechanism experiments and previous research works, a probable mechanism is proposed.