N-Phosphino Sulfinamide Ligands: An Efficient Manner To Combine Sulfur Chirality and Phosphorus Coordination Behavior

Four in a row: Four linked heteroatoms (P‐N‐S‐O) constitute the backbone of N‐phosphino tert‐butylsulfinamides, a novel class of chiral ligands (see picture, P yellow, N blue, S magenta, O red). Carbon substituents surrounding the central heteroatomic spine transmit the chirality of the sulfur center throughout the ligand. As bidentate P,S ligands in dicobalt–alkyne complexes, they can be used in the asymmetric intermolecular Pauson–Khand reaction.