Chiral Diarylamido (SO)-N-(SO) Sulfoxide Pincer Ligands
Only recently S-stereogenic sulfoxides have emerged as a versatile and encouraging novel class of ligands. Besides the proximity of the chiral information, located at the sulfur atom, to a ligated metal and thus to the reaction center, sulfoxides may switch between S and O coordination and bind to “hard” and “soft” metals, respectively. Combination of these attractive features of sulfoxides with the rigid, C2-symmetric, T-shaped configuration of a pincer scaffold leads to a promising ligand system for asymmetric catalysis.
H. Locke, A. Herrera, F. W. Heinemann, A. Linden, S. Frieß, B. Schmid, R. Dorta; Chiral (SO)–N–(SO) Sulfoxide Pincer Complexes of Mg, Rh, and Ir: N–H Activation and Selective Sulfoxide Reduction upon Ligand Coordination, Organometallics, 2015, 34, 1925-1931