Journal
TETRAHEDRON
Volume 60, Issue 41, Pages 9037-9042Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2004.07.086
Keywords
catalytic; asymmetric; oxidation; biaryl; coupling; binaphthol
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Mono-N-alkylated octabydrobinaphthyl-2,2'-diamine (H-8-BINAM) chiral ligands were employed in the catalytic and asymmetric oxidative coupling of methyl 3-hydroxy-2-naphthoate to the corresponding binaphthol derivative. The diamine ligand with one N-(3-pentyl) group shows highest enantioselectivity in the biaryl coupling among other BINAM derivatives, and the coupling reaction proceeds faster than the reactions using alkanediamine ligands. (C) 2004 Elsevier Ltd. All rights reserved.
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