magnesium salt of monoperphthalic acid in methanol T=0°C; 1 h;

tetrabutylammomium bromide; sodium in toluene

1: 86 percent / trifluoroacetic acid / benzene / 5 h / Heating 2: 1.) diisopropylamine, n-BuLi / 1) THF, hexane, HMPA, -5 deg C, 1 h; 2) THF, hexane, rt, 20 h 3: 85 percent / magnesium peroxyphthalate / methanol / 1 h / 0 °C View Scheme

1: 1.) diisopropylamine, n-BuLi / 1) THF, hexane, HMPA, -5 deg C, 1 h; 2) THF, hexane, rt, 20 h 2: 85 percent / magnesium peroxyphthalate / methanol / 1 h / 0 °C View Scheme

1: 1.) diisopropylamine, n-BuLi / 1) THF, hexane, HMPA, -5 deg C, 1 h; 2) THF, hexane, rt, 20 h 2: 85 percent / magnesium peroxyphthalate / methanol / 1 h / 0 °C View Scheme