Best ligand for Pd-catalyzed coupling of 5-iodouracil and unsaturated tributylstannanes: Synlett, 157 (1991). Large rate enhancements (10 2 -10 3 ) over triphenylphosphine are observed in Pd-catalyzed coupling of olefinic stannanes and electrophiles: J. Am. Chem. Soc ., 113, 9585 (1991). In a study of Pd-catalyzed coupling reactions in supercritical CO 2, this ligand was among the best tried in both the Stille and Heck reactions, giving much superior results to e.g. triphenyl- or tri(o-tolyl)phosphine: Chem. Commun., 1397 (1998).