Solid acid-catalyzed one-pot multi-step cascade reaction: Multicomponent synthesis of indol-3-yl acetates and indol-3-yl acetamides in water
作者:Furen Zhang、Chunmei Li、Zhen Yang、Linjun Shao、Chenze Qi、Zhenlu Shen
DOI:10.1016/j.tet.2022.132839
日期:2022.7
simple one-pot three-step procedure, involving the sequential mixture of 3-(arylamino)cyclohex-2-en-1-ones, 2,2-dihydroxy-1-arylethan-1-ones, meldrum acid, and alcohols, anilines in the of solid acid at 80 °C. Significantly, this strategy not only expands the application range of solid acid, but also provides a series of 2-(4-oxo-1,2-diphenyl-4,5,6,7-tetrahydro-1H-indol-3-yl)acetate/acetamide derivatives
已经开发了一种固体酸催化的缩合/分子间亲核加成/分子内环化、酯化和胺化的级联反应,以快速构建复杂的多取代吲哚化合物。这种一锅三步五组分级联反应提供了一系列 2-(4-oxo-1,2-diphenyl-4,5,6,7-tetrahydro-1 H-indol-3-yl) 乙酰胺衍生物在温和条件下具有良好的收率。该工艺具有一些吸引人的特点,包括廉价易得的试剂、大的底物范围、可分离的中间产物、可回收的固体酸催化剂,更重要的是,它可以通过简单的一锅三步程序方便地进行,包括顺序3-(arylamino)cyclohex-2-en-1-ones、2,2-dihydroxy-1-arylethan-1-ones、meldrum 酸和醇、苯胺在固体酸中的混合物,温度为 80 °C。值得注意的是,该策略不仅扩大了固体酸的应用范围,还提供了一系列2-(4-oxo-1,2-diphenyl-4,5,6,7-tetrahydro-1