Zhang‐Lin Zhou, E. Weber, J. Keana
Oct 16, 1995
Citations
0
Influential Citations
4
Citations
Journal
Tetrahedron Letters
Abstract
Abstract Treatment of 6,7-dialkoxy-1.4-dihydroquinoxaline-2.3-diones 3 with fuming nitric acid in acetic acid at 25 °C resulted in an acetoxylation reaction, giving 5-acetoxy-6,7-dialkoxy-1,4-dihydroquinoxaline-2 .3-diones 4 in moderate yields A mechanism involving ipso attack of nitronium ion as the first step is proposed.