“Instant Methylide” Modification of the Corey–Chaykovsky Cyclopropanation Reaction

Abstract Treatment of various electron‐deficient alkenes in DMSO with stable, dry, equimolar mixtures of either Me3S(O)I/KOt‐Bu or Me3S(O)I/NaH cleanly afforded the corresponding substituted cyclopropanes in good yields and short reaction times (<20 min for reactions at 50–60°C using 0.4–4.0 mmol alkene).

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