Asymmetric Alkynylation of β-Ketoesters and Naphthols Promoted by New Chiral Biphenylic Iodanes

The preparation of new chiral biphenylic lambda(3)-iodane reagents bearing transferable alkynyl ligands is described. These reagents transfer their carbon-based ligands onto beta-ketoesters with an enantiomeric excess (ee) up to 68%, and most remarkably, enable the dearomative alkynylation of naphthols in good to high yields up to 84%ee.