Synthesis 2013; 45(11): 1546-1552
DOI: 10.1055/s-0033-1338441
paper
© Georg Thieme Verlag Stuttgart · New York

A Green Synthesis of Quinoxalines and 2,3-Dihydropyrazines

Camilla Delpivo
Department of Industrial Chemistry ‘Toso Montanari’, Viale Risorgimento 4, 40136 Bologna, Italy   Fax: +39(051)2092654   Email: gabriele.micheletti3@unibo.it
,
Gabriele Micheletti*
Department of Industrial Chemistry ‘Toso Montanari’, Viale Risorgimento 4, 40136 Bologna, Italy   Fax: +39(051)2092654   Email: gabriele.micheletti3@unibo.it
,
Carla Boga
Department of Industrial Chemistry ‘Toso Montanari’, Viale Risorgimento 4, 40136 Bologna, Italy   Fax: +39(051)2092654   Email: gabriele.micheletti3@unibo.it
› Author Affiliations
Further Information

Publication History

Received: 24 January 2013

Accepted after revision: 02 April 2013

Publication Date:
08 May 2013 (online)


Abstract

Quinoxaline and dihydropyrazine derivatives were obtained in high yields by simple addition of 1,2-diamines and 1,2-dicarbonyl compounds in water. In some cases, the products spontaneously precipitated from the reaction mixture, making it possible to recover and reuse the mother liquor for further condensations. The very mild reaction conditions, the high yields of the products, and the absence of any catalyst make this methodology an efficient and green route to quinoxalines and dihydropyrazines.

Supporting Information