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Updated: Mar 24, 2026

Palladium N-Heterocyclic Carbene Complexes: Synthesis from Benzimidazolium Salts and Catalytic Activity in Carbon-carbon Bond-forming Reactions
Published on: July 30, 2017
Palladium-Catalyzed N-Arylation of Cyclopropylamines
Peter G Gildner1, Andrew DeAngelis1, Thomas J Colacot1
1Johnson Matthey Catalysis and Chiral Technologies, 2001 Nolte Drive, West Deptford, New Jersey 08066, United States.
Abstract:
A general method has been developed for the previously challenging arylation of cyclopropylamine and N-arylcyclopropylamines. Highly active, air-stable, and commercially available R-allylpalladium precatalysts provide access to a wide range of (hetero)arylated cyclopropylanilines in high yields. Precatalysts [(tBuBrettPhos)Pd(allyl)]OTf and [(BrettPhos)Pd(crotyl)]OTf, deliver monoarylated products, while (PtBu3)Pd(crotyl)Cl is suited for preparing unsymmetrical diarylated products. The developed conditions tolerate a range of functional groups and heterocycles, allowing access to an array of arylated cyclopropylamines, a motif present in prominent drug molecules.
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