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This research demonstrates a triple C─C bond process for cyclopropane synthesis and highlights the potential of sultines.
We describe a triple C─C bond cascade process for heteroaryl cyclopropane synthesis, through the reaction of vinyl sulfonium salts and sulfones under mild conditions. An initial conjugate addition (C─C bond 1) sets up a Smiles–Truce rearrangement (C─C bond 2), with a final 3‐exo‐ tet ring closure (C─C bond 3) affording cyclopropanes. Serendipitously, we uncovered a novel reaction variant that affords sultines, an under‐explored heterocycle with potential application as a bioisostere in medicinal chemistry.
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Sephton et al. (2025) studied this question.
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