作者:Xiong Zhang、Ebenezer Jones‐Mensah、Jackson Deobald、Jakob Magolan
DOI:10.1002/adsc.201901037
日期:2019.12.17
We evaluated the influence of solvent on the alumina‐promoted C3‐alkylation of indoles with α,β‐unsaturated ketones. We found that lipophilic solvents were generally superior to hydrophilic ones with hexanes offering the 3‐alkyl indole products in high yields. Thus, we demonstrate an inexpensive and procedurally simple new process that pairs acidic alumina with hexanes to achieve this important Michael
我们评估了溶剂对带有α,β-不饱和酮的吲哚的氧化铝促进的C3-烷基化的影响。我们发现亲脂性溶剂通常优于亲水性溶剂,而己烷可提供高收率的3-烷基吲哚产物。因此,我们证明了一种廉价且程序简单的新方法,该方法将酸性氧化铝与己烷配对以实现这一重要的迈克尔烷基化反应。底物范围包括二十四个实例,反应产率为61%至96%。