sodium tungstate; dihydrogen peroxide in ethanol

sodium tungstate; dihydrogen peroxide in methanol; water Inert atmosphere;

methanesulfonic acid in dichloromethane 0.5 h;

1: 73 percent / H2SO4 / acetic acid 2: 13 percent / polyphosphoric acid 3: 52 percent / aq. hydrogen peroxide, sodium tungstate / ethanol View Scheme

1: 13 percent / polyphosphoric acid 2: 52 percent / aq. hydrogen peroxide, sodium tungstate / ethanol View Scheme

1: triethylamine / dichloromethane / 20 °C / |Inert atmosphere 2: boron trifluoride diethyl etherate / |Inert atmosphere 3: toluene-4-sulfonamide; ammonia; lithium / -50 - -33 °C / |Inert atmosphere 4: dihydrogen peroxide; sodium tungstate / water; methanol / |Inert atmosphere View Scheme

1: boron trifluoride diethyl etherate / |Inert atmosphere 2: toluene-4-sulfonamide; ammonia; lithium / -50 - -33 °C / |Inert atmosphere 3: dihydrogen peroxide; sodium tungstate / water; methanol / |Inert atmosphere View Scheme

1: toluene-4-sulfonamide; ammonia; lithium / -50 - -33 °C / |Inert atmosphere 2: dihydrogen peroxide; sodium tungstate / water; methanol / |Inert atmosphere View Scheme