potassium carbonate in methanol; water mixt. stirred at 25°C for 10 h; filtration; MeOH removed in vac.; soln. cooled; acidified (HCl); crystn.; filtration; washed (H2O); IR; NMR; mass spectra;

1,3-bis-(diphenylphosphino)propane; oxygen; palladium diacetate in dimethyl sulfoxide T=60°C; 90 h;