Effects of the electronic properties of chiral chelating diphosphines in stereoselective Diels-Alder cycloaddition reactions promoted by their transition metals complexes
The Pd(II) and Pt(II) complexes (perchlorates and hexafluoroantimoniates, respectively) of a series of C2 symmetric biheteroaromatic diphosphines differing in their electronic properties at phosphorus have been tested as catalysts in [4 + 2]-cy