Expedient Syntheses of β-Iodofurans by 5-endo-dig Cyclisations
作者:Sean P. Bew、Gamila M. M. El-Taeb、Simon Jones、David W. Knight、Wen-Fei Tan
DOI:10.1002/ejoc.200700681
日期:2007.12
yields of the corresponding β-iodofurans. The necessary precursors are available from a number of different approaches, notably regioselective bis-hydroxylation of conjugated enynes and the addition of acetylides to α-hydroxy carbonyl groups. The initial iodofurans can be homologated using a number of strategies, ranging from various transition metal-catalysed couplings to halogen-metal exchange and subsequent