Selective C−S Bond Formation via Fe-Catalyzed Allylic Substitution

In contrast to the formation of C-O and C-N bonds it was only recently that the selective C-S bond formation by means of transition metal complexes moved more into the center of research. This is somewhat surprising given the fact that the sulfur atom in a functional group can possess different oxygenation levels which correspond to different chemical properties and reaction portfolios. Herein we wish to communicate a regioselective Fe-catalyzed allylic sulfonation that allows for the preparation of various chiral aryl allyl sulfones in good to excellent yields.