A chiral bidentate ligand containing an electron deficient phosphorus and an electron rich phosphorus, separated by a two atom linker was synthesized. The electronic and steric properties of the electron deficient phosphoramide half of the ligand were modified by varying the substituents on the nitrogens.  The synthesis was similar to that of binaphthyl based triamides with modifications for attaching the electron rich phosphorus centers. It is envisioned that the chiral, chelating nature and the disparity in the electronic characteristics for the two phosphorus sites will improve the enantioselectivity of the rhodium  hydroformylation reaction. In addition, we are examining this class of ligands for catalytic reactions of noble metals.

Synthesis and application of 1,1'-binaphthyl-2,2'-diamine based chiral chelating ligands in asymmetric catalysis

244th National Meeting (2012)

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