An efficient regioselective C-3 acylation of free indoles (N-H) has been accomplished via oxidative decarbethoxylation of easily available ethyl arylacetates using Cu(OAc)2 and KOtBu in DMSO.
A novel microwave-irradiated solvent-free 3-acylation of indoles on alumina
作者:Qiu Yu Lai、Rong Su Liao、Shao Yong Wu、Jia Xin Zhang、Xin Hong Duan
DOI:10.1039/c3nj00854a
日期:——
A simple and efficient 3-acylation of indoles under microwave-heated and solvent-free conditions is developed. This general procedure uses neutral Al2O3 as a new, green and reusable catalyst giving good to high yields within short reaction times. Utilizing such an environmentally-benign methodology, a variety of indoles bearing electron-releasing or electron-withdrawing groups were conveniently acylated.
An efficient Cu-catalyzed decarboxylative C3-acylation of free (NâH) indoles using α-oxocarboxylic acids as acylating agents has been developed. This method was compatible with a variety of functional groups and provided an attractive alternative access to 3-acylindoles in moderate to high yields.