Sabine Grupe and Prof. Dr. Axel Jacobi von Wangelin Iron-Catalyzed Synthesis of Cyclopropyl Halides ChemCatChem 5
Under a halo: Selective iron-catalyzed hydrodehalogenations of dibromo- and dichlorocyclopropanes are effectively realized with tBuMgCl as the reductant. The reactions proceed under mild conditions and exhibit superior selectivities to iron-free protocols, as no allenes are formed. The sequential combination of base-mediated dihalocyclopropanation and this mono-dehalogenation provides straightforward access to substituted monohalocyclopropanes.
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