Allosteric effects in asymmetric hydrogenation catalysis? Asymmetric induction as a function of the substrate and the backbone flexibility of C 1-symmetric …

A Baber, JG de Vries, AG Orpen, PG Pringle…

Index: Baber, Angharad; De Vries, Johannes G.; Orpen, A. Guy; Pringle, Paul G.; Von Der Luehe, Karl Dalton Transactions, 2006 , # 40 p. 4821 - 4828

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Citation Number: 9

Abstract

The new unsymmetrical, optically active ligands 1, 2-C2H4 (PPh2)(2′ R, 5′ R-2′, 5′- dimethylphospholanyl)(Laa) and 1, 3-C3H6 (PPh2)(2′ R, 5′ R-2′, 5′- dimethylphospholanyl)(Lbb) form complexes of the type [Rh (L)(cyclooctadiene)][BF4] where L= Laa (1a) or Lbb (1b),[PtCl2 (L)] where L= Laa (2a) or Lbb (2b) and [PdCl2 (L)] where L= Laa (3a) or Lbb (3b). The crystal structures of 2a and 2b show the chelate ligand ...