Chiral discrimination at the η3-allyl units of rhodium(I) η3-cyclooctenyl complexes containing chiral bidentate phosphines was written by Lange, Susanne;Wittmann, Klaus;Gabor, Barbara;Mynott, Richard;Leitner, Walter. And the article was included in Tetrahedron: Asymmetry in 1998.Recommanded Product: (2S,4S)-Pentane-2,4-diylbis(diphenylphosphine) This article mentions the following:
A three step synthesis of Rh(I) η3-cyclooctenyl complexes [(P2*)Rh(η3-C8H13)] (P2* = chiral bidentate phosphine, e.g. (S,S)-4,5-bis(diphenylphosphinomethyl)-2,2-dimethyl-1,3-dioxolane) starting from com. available [{(cod)Rh(μ-Cl)}2] is described. Examination of these complexes by multinuclear NMR-spectroscopy reveals a distinct stereochem. differentiation of the terminal positions of the η3-allyl unit. Preliminary results on the reactivity of these compounds towards various electrophiles E-X (e.g. MeOTf) are reported; hydrogen transfer is preferred over formation of C-E bonds. In the experiment, the researchers used many compounds, for example, (2S,4S)-Pentane-2,4-diylbis(diphenylphosphine) (cas: 77876-39-2Recommanded Product: (2S,4S)-Pentane-2,4-diylbis(diphenylphosphine)).
(2S,4S)-Pentane-2,4-diylbis(diphenylphosphine) (cas: 77876-39-2) belongs to chiral phosphine ligands. The synthesis of novel trialkylphosphines can be quite difficult, thereby limiting the scope of their chiral variants. Over the last decade, however, and especially since 2005, considerable progress has been made in asymmetric phosphine catalysis.Recommanded Product: (2S,4S)-Pentane-2,4-diylbis(diphenylphosphine)
Referemce:
Phosphine ligand,
Chiral phosphines in nucleophilic organocatalysis