CC BY-NC-ND 4.0 · SynOpen 2020; 04(03): 55-61
DOI: 10.1055/s-0040-1707203
paper
This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial-License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/) (2020) The Author(s)

Synthesis of Quinoxalin-2(1H)-ones and Hexahydroquinoxalin-2(1H)-ones via Oxidative Amidation–Heterocycloannulation

Akula Raghunadh
a   Technology Development Centre, Custom Pharmaceutical Services, Dr. Reddy’s Laboratories Ltd, Hyderabad 560049, India
,
b   Department of Chemistry, CHRIST (Deemed to be University), Hosur Road, Bangalore 560026, India   Email: krishnaji.tadiparthi@christuniversity.in
,
Suresh Babu Meruva
a   Technology Development Centre, Custom Pharmaceutical Services, Dr. Reddy’s Laboratories Ltd, Hyderabad 560049, India
,
V. Narayana Murthy
a   Technology Development Centre, Custom Pharmaceutical Services, Dr. Reddy’s Laboratories Ltd, Hyderabad 560049, India
,
L. Vaikunta Rao
c   Department of Chemistry, GIS, GITAM University, Visakhapatnam 530045, India
,
U. K. Syam Kumar
a   Technology Development Centre, Custom Pharmaceutical Services, Dr. Reddy’s Laboratories Ltd, Hyderabad 560049, India
› Author Affiliations
Dr. Krishnaji acknowledges CHRIST (Deemed to be University) for funding through a Major Research Project (MRP # MRPDSC-1723).
Further Information

Publication History

Received: 02 June 2020

Accepted after revision: 30 June 2020

Publication Date:
18 August 2020 (online)


Abstract

A metal-catalyst-free synthesis of substituted quinoxalin-2-ones from 2,2-dibromo-1-arylethanone by employing an oxidative amidation–heterocycloannulation protocol is reported. The substrate scope of the reaction has been demonstrated and a possible mechanism for this reaction has also been proposed.

Supporting Information