Experimental study demonstrates catalyst-free electrosynthesis of cyclic isoureas from alkenyl ureas, highlighting a sustainable annulation pathway under ambient conditions.
A direct electrosynthesis of cyclic isoureas from N‐allyl ureas and diselenides has been described. This protocol proceeds without any additional catalyst and oxidant, at room temperature under air, providing the desired products in 71–91% yield. 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.
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Li et al. (2023) studied this question.
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