Copper-Catalyzed Asymmetric [4+1] Cycloadditions of Enones with Diazo Compounds To Form Dihydrofurans
journal contributionposted on 07.02.2007 by Sunghee Son, Gregory C. Fu
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This report describes the use of a planar-chiral bipyridine ligand to achieve the first diastereo- and enantioselective copper-catalyzed [4+1] cycloadditions of enones with diazo compounds to produce highly substituted 2,3-dihydrofurans. The method is applied to a catalytic asymmetric synthesis of a deoxy-C-nucleoside.