Abstract
Axially chiral P,S-heterodonor ligand L1 is effective in the asymmetric allylic substitution of 1,3-diphenylpropenyl acetate with dimethyl malonate. its bidentate coordination pattern to a I'd metal center with both P and S atoms has been unambiguously established by X-ray diffraction and NMR spectroscopic analyses. Herein, we further disclose that axially chiral S,S-heterodonor ligands L2-L4 are also effective in the same reaction to give the allylic alkylation product in moderate to good ee. However, the corresponding S,O-heterodonor ligands are not as effective as the corresponding P,S- or S,S-heterodonor ligands in the same asymmetric reaction. (C) 2004 Elsevier Ltd. All rights reserved.
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