3-Alkenylindoles are biologically and medicinally very important compounds, and their syntheses have received considerable attention. Herein, we report the synthesis of 3-alkenylindoles via a regioselective alkenylation of indoles, catalysed by a ruthenium nanocatalyst (RuNC). The reaction tolerates several electron-withdrawing and electron-donating groups on the indole moiety. Additionally, a “robustness screen” has also been employed to demonstrate the tolerance of several functional groups relevant to medicinal chemistry. With respect to the Ru nanocatalyst, it has been demonstrated that it is recoverable and recyclable up to four cycles. Also, the catalyst acts through a heterogeneous mechanism, which has been proven by various techniques, such as ICPMS and three-phase tests. The nature of the Ru nanocatalyst surface has also been thoroughly examined by various techniques, and it has been found that the oxides on the surface are responsible for the high catalytic efficiency of the Ru nanocatalyst.
3-烯基吲哚是生物学和药学上非常重要的化合物,它们的合成受到了广泛关注。在这里,我们报告了通过钌纳米催化剂(RuNC)催化的吲哚的区域选择性烯基化合成3-烯基吲哚。该反应容忍吲哚基上的多种电子吸引和电子供体基团。此外,还采用了“稳健性筛选”来展示对药物化学相关的几种功能基团的耐受性。关于钌纳米催化剂,已经证明它可回收和循环使用高达四个周期。此外,催化剂通过异质机制起作用,这已通过各种技术(如ICPMS和三相测试)证明。还通过各种技术彻底研究了钌纳米催化剂表面的性质,并发现表面氧化物负责钌纳米催化剂的高催化效率。