Magnetic nano Fe3O4 and CuFe2O4 as heterogeneous catalysts: A green method for the stereo- and regioselective reactions of epoxides with indoles/pyrroles
this paper, we report a new solvent-free catalytic method using the magnetic nano Fe3O4 and CuFe2O4 as competent heterogeneous catalysts for the stereo- and regioselective reactions of epoxides with indoles/pyrroles, which gave the C-alkylated indoles/pyrroles. Chiral epoxides gave the alkylated indoles with a complete inversion of stereochemistry.
在本文中,我们报告了一种新的无溶剂催化方法,该方法使用磁性纳米Fe 3 O 4和CuFe 2 O 4作为有效的非均相催化剂,用于环氧化物与吲哚/吡咯的立体和区域选择性反应,使C-烷基化吲哚/吡咯。手性环氧化物使烷基化的吲哚具有完全的立体化学转化。
Friedel-Crafts Alkylation of Nitrogen Heterocycles Using [Bmim][OTf] as a Catalyst and Reaction Medium
Friedel-Crafts alkylation of nitrogenheterocycles, such as indoles and pyrroles, can be carried out in ionic liquids under mild conditions to afford the corresponding alkylated product in moderate to good yields
An efficient Friedel–Crafts alkylation of nitrogen heterocycles catalyzed by antimony trichloride/montmorillonite K-10
作者:Yu-Heng Liu、Qiu-Shuang Liu、Zhan-Hui Zhang
DOI:10.1016/j.tetlet.2008.12.022
日期:2009.2
It has been found that SbCl3 supported on montmorillonite K-10 is an efficient and reusable catalyst for Friedel–Crafts alkylation of nitrogenheterocycles such as indoles and pyrroles with epoxides. The reaction gives the corresponding C-alkylated derivatives in good to excellent yields with a high regioselectivity.