Synthesis 2015; 47(17): 2680-2689
DOI: 10.1055/s-0034-1380678
paper
© Georg Thieme Verlag Stuttgart · New York

A Combined Experimental and Theoretical Study of the Ammonium Bifluoride Catalyzed Regioselective Synthesis of Quinoxalines and Pyrido[2,3-b]pyrazines

Frédéric Lassagne*
a   Chimie et Photonique Moléculaires, Institut des Sciences Chimiques de Rennes, UMR 6226, Université de Rennes 1-CNRS, Bâtiment 10A, Case 1003, Campus de Beaulieu, 35042 Rennes, France   Email: frederic.lassagne@univ-rennes1.fr   Email: florence.mongin@univ-rennes1.fr
,
Floris Chevallier
a   Chimie et Photonique Moléculaires, Institut des Sciences Chimiques de Rennes, UMR 6226, Université de Rennes 1-CNRS, Bâtiment 10A, Case 1003, Campus de Beaulieu, 35042 Rennes, France   Email: frederic.lassagne@univ-rennes1.fr   Email: florence.mongin@univ-rennes1.fr
,
Thierry Roisnel
b   Centre de Diffractométrie X, Institut des Sciences Chimiques de Rennes, UMR 6226, Université de Rennes 1-CNRS, Bâtiment 10B, Case 1003, Campus de Beaulieu, 35042 Rennes, France
,
Vincent Dorcet
b   Centre de Diffractométrie X, Institut des Sciences Chimiques de Rennes, UMR 6226, Université de Rennes 1-CNRS, Bâtiment 10B, Case 1003, Campus de Beaulieu, 35042 Rennes, France
,
Florence Mongin*
a   Chimie et Photonique Moléculaires, Institut des Sciences Chimiques de Rennes, UMR 6226, Université de Rennes 1-CNRS, Bâtiment 10A, Case 1003, Campus de Beaulieu, 35042 Rennes, France   Email: frederic.lassagne@univ-rennes1.fr   Email: florence.mongin@univ-rennes1.fr
,
Luis R. Domingo*
c   Universidad de Valencia, Departamento de Química Orgánica, Dr. Moliner 50, 46100 Burjassot, Valencia, Spain   Email: domingo@utopia.uv.es
› Author Affiliations
Further Information

Publication History

Received: 09 February 2015

Accepted after revision: 02 April 2015

Publication Date:
19 May 2015 (online)


Abstract

Ammonium bifluoride was efficiently used at a 0.5 mol% loading to catalyze the cyclocondensation of 1,2-arylenediamines with 1,2-dicarbonyl compounds at room temperature in methanol–water to give quinoxalines or pyrido[2,3-b]pyrazines in excellent yields. Importantly, 2,8-disubstituted quinoxalines and 3-substituted pyrido[2,3-b]pyrazines were regioselectively formed by the reaction of arylglyoxals with 3-methylbenzene-1,2-diamine or pyridine-2,3-diamine, respectively. An analysis of the density functional theory reactivity indices explained the catalytic role of ammonium bifluoride.

Supporting Information