bicyclo[2.2.1]hepta-2,5-diene; tetrakis(triphenylphosphine) palladium(0) in toluene T=110°C; 24 h;

in toluene byproducts: CO; under Ar; NCCOOPh added to toluene dispersion of Pd(PPh3)4 at room temp.; stirred for 48 h; filtered; solid washed with hexane; dried under vac.; detd. by (1)H and (31)P NMR spectra;