... The Journal of Organic ... E-mail: bert.maes@ua.ac.be. ... A set of triphenylphosphine-based palladium precatalysts were assessed (Pd(PPh 3 ) 4 , PdCl 2 (PPh 3 ) 2 ), but a combination of Pd(dba) 2 and P(o-furyl) 3 as a ligand was identified as optimal.(31) At room temperature, no ...