The Trost ligand is a diphosphine used in the palladium-catalysis Trost asymmetric allylic alkylation. Other C2-symmetric ligands derived from trans-1,2-diaminocyclohexane (DACH) have been developed, such as the ( R, R)-DACH-naphthalene ligand derived from 2-diphenylphosphino-1-naphthalenecarboxylic acid. Related bidentate phosphine-containing ligands derived from other chiral diamines and 2-diphenylphosphinobenzoic acid have also been developed for applications in asymmetric synthesis.
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