Catalytic Efficiency of a New Tridentate Ferrocenyl Phosphine Auxiliary: Sonogashira Cross-Coupling Reactions of Alkynes with Aryl Bromides and Chlorides at Low Catalyst Loadings of 10<sup>-</sup><sup>1</sup> to 10<sup>-</sup><sup>4</sup> Mol %
Jean‐Cyrille Hierso, Aziz Fihri, Régine Amardeil, et al.·2004·Organic Letters