Short-RInChIKey=SA-FUHFF-UHFFFADPSC-PIGGJTQWHR-UHFFFADPSC-NUHFF-NUHFF-NUHFF-ZZZ

Selenium dioxide (2.04 g, 18.4 mmol, 5.00 equiv) and 2-methyl-3-(octyloxy)quinoxaline (1.00 g, 3.67 mmol, 1.00 equiv) were dissolved in 1,4-dioxane (20.00 mL) and then tert-butyl hydroperoxide (1.04 g, 1.47 mL, 8.08 mmol, 5.50M, 2.20 equiv) in decane was added. The solution was stirred to 50 °C for 12 h. The solution was allowed to reach 21 °C. Methylene chloride (250 mL) and distilled water (200 mL) were then added and the aqueous layer was extracted 3x with methylene chloride (100 mL) each time. The organic layers were combined and dried over Na2SO4. The solvent was removed under reduced pressure.