Abstract
Abstract Catalytic asymmetric Pauson–Khand reactions with chiral bidentate phosphines as ligands have been successfully accomplished. The catalytic use of ( S )-BINAP as a ligand was demonstrated to be the most effective in the cobalt-catalyzed reactions of 1,6-enynes, providing a facile entry to optically active 2-cyclopentenone derivatives with high enantioselectivity. A plausible mechanism for the asymmetric induction is proposed on the basis of the stereochemical outcome obtained.
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