Iodolium salts as halogen-bond donor catalysts in the Nazarov cyclization: the molecular oxygen enigma
作者:Avery J. To、Graham K. Murphy
DOI:10.1039/d2nj02731c
日期:——
Nazarov cyclizations of activated precurosrs are achieved under iodolium catalysis, provided that oxygen is present for catalyst activation and turnover.
Copper-Catalyzed Asymmetric [4+1] Cycloadditions of Enones with Diazo Compounds To Form Dihydrofurans
作者:Sunghee Son、Gregory C. Fu
DOI:10.1021/ja068344y
日期:2007.2.1
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 diazocompounds to produce highly substituted 2,3-dihydrofurans. The method is applied to a catalytic asymmetric synthesis of a deoxy-C-nucleoside.