A simple Lewis acid induced reaction of phenols with electrophiles: Synthesis of functionalized 4<i>H</i>-chromenes and <i>ortho</i>-benzylphenols
作者:Chinnabattigalla Sreenivasulu、Ditto Abraham Thadathil、Sumit Pal、Satyanarayana Gedu
DOI:10.1080/00397911.2019.1689268
日期:2020.1.2
Abstract Lewis acid ZnCl2 promoted cyclization protocol to 4H-chromenes is accomplished, using readily available phenols and acetophenones as starting materials. Interestingly, the process is feasible under the solvent free environment. Synthesis of a variety of 4H-chromenes have been accomplished using this strategy. In addition, this concept is extended to the synthesis of ortho-benzylphenols by
摘要 路易斯酸 ZnCl2 促进了生成 4H-色烯的环化协议,使用容易获得的苯酚和苯乙酮作为起始材料。有趣的是,该过程在无溶剂环境下是可行的。使用这种策略已经完成了多种 4H-色烯的合成。此外,该概念通过用苯乙烯或仲苄醇处理苯酚而扩展到邻苯甲基苯酚的合成。图形概要