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Copper-catalyzed enantioselective conjugate addition of triethylaluminum to 2-cyclopentenone

Journal

TETRAHEDRON-ASYMMETRY
Volume 14, Issue 13, Pages 1865-1869

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0957-4166(03)00349-5

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Bidentate phosphites were prepared starting from BINOL, H-8-BINOL or 3,3', 5,5'-tetra-tert-butyl-2,2'-biphenol. Utilization of these ligands in the copper-catalyzed enantioselective conjugate addition of triethylaluminum to 2-cyclopentenone afforded 3-ethylcyclopentanone in up to 94.0% ee. (C) 2003 Elsevier Science Ltd. All rights reserved.

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