A Green Synthesis of Indolo[2,3-<i>b</i>]Quinoxaline Derivatives
作者:Hong Zhang
DOI:10.3184/174751914x14146737095013
日期:2014.12
A simple, efficient and eco-friendly synthesis of a series of structurally new indolo[2,3-b]quinoxalinederivatives has been developed. The synthesis mainly relies on the condensation reaction of various isatins with o-phenylenediamine in water with the use of benzyltriethylammonium chloride as catalyst. The protocol is very simple, avoids toxic solvents and catalysts, is easy to work-up and is thus