Green Progression for Synthesis of Regioselective β-Amino Alcohols and Chemoselective Alkylated Indoles
作者:Boningari Thirupathi、Rapelli Srinivas、Avvari N. Prasad、J. K. Prashanth Kumar、Benjaram M. Reddy
DOI:10.1021/op1002177
日期:2010.11.19
Solid acid catalysts based on zirconia materials were investigated for the first time as catalysts for regioselective organic synthesis under environmentally benign and mild conditions. The novel TiO2−ZrO2 mixed oxide catalyst led to two distinct products by the formation of an N−C bond (β-aminoalcohols) and a C−C bond (Friedel−Crafts alkylation).
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.