Abstract
Copper‐promoted annulation reactions of terminal alkynes with 2‐aminopyridines have been developed for the synthesis of 2‐halogenated imidazo[1,2‐a]pyridines using copper halide as the halogen source. A variety of substrates survived under the reaction conditions and gave the desired products in good yields. This reaction features advantages such as easily available starting materials, broad substrate scope, and mild reaction conditions.
Published Version
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