Hydrazone-Promoted Sonogashira Coupling Reaction with Aryl Bromides at Low Palladium Loadings

[摘要]：The Sonogashira coupling reaction of aryl bromides with a variety of terminal alkynes in DMSO at 125 degrees C gave internal arylated alkynes using low-loaded Pd(acac)(2) with hydrazone as a ligand and CuI as the co-catalyst in good yields.

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