Quinolinophane-derived alkyldiphenylphosphines: two homologous P, N-planar chiral ligands for palladium-catalysed allylic alkylation
R Ruzziconi, C Santi, S Spizzichino
Index: Ruzziconi, Renzo; Santi, Claudio; Spizzichino, Sara Tetrahedron Asymmetry, 2007 , vol. 18, # 14 p. 1742 - 1749
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Citation Number: 11
Abstract
Two novel homologous [2] paracyclo [2](5, 8) quinolinophane-derived P, N-bidentate planar chiral ligands have been synthesised and their effectiveness in asymmetric catalysis tested in palladium-catalysed allylic malonylation of 1, 3-diphenylpropenyl acetate. The extent of asymmetric induction depends linearly on the ligand/metal molar ratio, indicating the involvement of P, P-type and chelate P, N-type π-allylpalladium complexes in equilibrium. ...
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