Hydrogen Peroxide → 1-Methyl-1,4-dihydro-2,3-quinoxalinedione

Participants

Reaction Steps

1-Methyl-2(1H)-quinoxalinone (5.3 grams) was allowed to stand at room temperature for 72 hours in a mixture of 60 ml. of acetic acid and 35 ml. of 30 percent hydrogen peroxide. The product separated out as needles after 48 hours. After 72 hours, no starting material was detectable in thesupernatant liquid by TLC (ethyl acetate). The product was separated and washed sequentially with water and with ethanol, m.p. 287°-289° C. It was then recrystallized from water, 287°-290° C. (literature: 286°-287° C., G. W. H. Cheeseman, J. Chem. Soc. 1804 (1955); 285°-286° C., G. W.H. Cheeseman, J. Chem. Soc. 1246 (1961)). NMR also confirmed the identity of the product.

Provenance & Evidence