Picolyl substituted N-heterocyclic carbene/palladium catalyzed Heck reactions

Novel 1,3-dialkylimidazolinium and 1,3-dialkyltetrahydropyrimidinium hexafluorophosphate salts as N -heterocyclic carbene precursors were prepared by reacting N,N -dialkylethandiamine or N,N -dialkylpropandiamine,triethyl orthoformate, and ammonium hexafluorophosphate. The salts were characterized spectroscopically and tested in homogeneous Heck reactions.