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Highly selective palladium-catalyzed cross-coupling of secondary alkylzinc reagents with heteroaryl halides.

Published Web Location

https://doi.org/10.1021/ol502230p
Abstract

The highly selective palladium-catalyzed Negishi coupling of secondary alkylzinc reagents with heteroaryl halides is described. The development of a series of biarylphosphine ligands has led to the identification of an improved catalyst for the coupling of electron-deficient heterocyclic substrates. Preparation and characterization of oxidative addition complex (L)(Ar)PdBr provided insight into the unique reactivity of catalysts based on CPhos-type ligands in facilitating challenging reductive elimination processes.

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