Efficient Synthetic Approach to Substituted Benzo[<i>b</i>]furans and Benzo[<i>b</i>]thiophenes by Iodine-Promoted Cyclization of Enaminones
作者:Ehecatl Labarrios、Alberto Jerezano、Fabiola Jiménez、María del Carmen Cruz、Francisco Delgado、L. Gerardo Zepeda、Joaquín Tamariz
DOI:10.1002/jhet.1686
日期:2014.7
An efficient synthetic approach to the substituted benzo[b]furan and benzo[b]thiophene scaffolds by iodine‐mediated cyclization of the corresponding enaminones is described. This protocol was applied to a large series of these latter precursors to afford the respective benzoheterocycles substituted at the C‐2 position by a carbonyl group functionality. A study of the factors that control this process
描述了一种通过碘介导的相应烯胺酮环化取代苯并[ b ]呋喃和苯并[ b ]噻吩骨架的有效合成方法。该方案适用于大量的这些后者的前体,以提供各自的苯并杂环在C-2位置被羰基官能团取代。对控制该过程的因素的研究表明,反应性取决于芳氧基羰基和芳硫羰基部分的芳环中电子给体基团的存在。