Regioselective Synthesis of Polysubstituted Carbazoles from Indoles and Simple 1,4‐Dicarbonyl Compounds
作者:Hugo Santos、Lucas A. Zeoly、Rafael Rebechi、João Arantes、Fernando Coelho、Manoel T. Rodrigues
DOI:10.1002/adsc.202301328
日期:2024.2.20
carbazoles were efficiently synthesized through direct benzannulation reaction between 1,4-dicarbonyl compounds and indoles with catalytic amount of inexpensive zirconium(IV) chloride. This transformation proved to be regioselective and furnishes 1,4-disubstituted and 1,2,4-trisubstituted carbazoles with yields ranging from 26% to 91% and broad substrate scope. Moreover, this protocol benefits from using readily