dihydrogen peroxide; methyltrioxorhenium (VII) in water; tert-butyl alcohol T=40°C; 16 h;

1: 92 percent / aq. 4-methylmorpholine N-oxide; 1,4-diazabicyclo[2,2,2]octane; potassium osmate / acetone / 24 h / 20 °C 2: 85 percent / 2,3-dichloro-5,6-dicyano-1,4-benzoquinone / dioxane / 10 h / 15 °C 3: 55 percent / aq. NH4NO3; Cu(OAc)2 / acetic acid / 0.5 h / 80 °C View Scheme

in acetic acid 0.75 h; Heating;