Abstract
AbstractHalogen (fluorine, chlorine, bromine, iodine) or chalcogen (sulfur, selenium)‐containing heterocycles are widely recognized as key building blocks in many natural products and bioactive targets. Catalytic asymmetric halogenation/chalcogenation of carbon‐carbon unsaturated bonds via onium ion transformations are efficient methods to obtain diverse chiral heterocyclic backbones. In the past few years, catalytic enantioselective versions of halo/thio/seleno‐functionalizations with various halogen and chalcogen electrophiles have experienced constant development. This review highlights those advances in preparing functionalized heterocycles promoted by chiral organocatalysts or metal‐based catalysts.magnified image
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