Preparation and Resolution of a Modular Class of Axially Chiral Quinazoline-Containing Ligands and Their Application in Asymmetric Rhodium-Catalyzed Olefin Hydroboration
作者:David J. Connolly、Patrick M. Lacey、Mary McCarthy、Cormac P. Saunders、Anne-Marie Carroll、Richard Goddard、Patrick J. Guiry
DOI:10.1021/jo049195+
日期:2004.10.1
Displacement of the resolving agent by reaction with 1,2-bis(diphenylphosphino)ethane afforded enantiopure ligand in each case. Their rhodium complexes were prepared and applied in the enantioselective hydroboration of a range of vinylarenes. The quinazolinap catalysts were found to be extremely active, giving excellent conversions, good to complete regioselectivities, and the highest enantioselectivities obtained
Synthetic and mechanistic studies in enantioselective allylic substitutions catalysed by palladium complexes of a modular class of axially chiral quinazoline-containing ligands
作者:Anne-Marie Carroll、Mary McCarthy、Patrick M. Lacey、Cormac P. Saunders、David J. Connolly、Annette Farrell、Balaji V. Rokade、Richard Goddard、Peter Fristrup、Per-Ola Norrby、Patrick J. Guiry
DOI:10.1016/j.tet.2019.130780
日期:2020.1
The application of palladium complexes of a modular series of axially chiral phosphinamine ligands, the Quinazolinaps, to the enantioselectivealkylation of 1,3-diphenyl-2-propenyl acetate with dimethyl malonate and methyl dimethyl malonate is described. Complete conversions and enantiomeric excesses of up to 91% were obtained. To elucidate the solution structure of these complexes and their dynamic