Efficient Palladium-Catalyzed Suzuki-Miyaura Cross-Coupling of Iodoethynes with Arylboronic Acids under Aerobic Conditions

Abstract

Ligand-free palladium-catalyzed Suzuki-Miyaura cross-coupling of iodoethynes with arylboronic acids under aerobic conditions has been developed. In the presence of palladium(II) acetate and cesium carbonate, a variety of iodoethynes underwent the Suzuki­-Miyaura cross-coupling reaction with arylboronic acids at room temperature to afford the corresponding internal alkynes in moderate to good yields. It is noteworthy that this protocol proceeds under mild and aerobic conditions without the aid of ligands.

Key words

palladium - iodoethynes - arylboronic acids - Suzuki-Miyaura - cross-coupling - alkynes

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