1.1: potassium hydrogen persulfate / methanol; water / 12 h / 0 - 20 °C / Inert atmosphere 2.1: n-butyllithium / tetrahydrofuran; hexane / 0.5 h / -78 - 0 °C / Inert atmosphere 2.2: 0 - 20 °C / Inert atmosphere 3.1: water; dihydrogen peroxide; sodium hydroxide / tetrahydrofuran; hexane / 0.5 h / 20 °C / Inert atmosphere View Scheme

1.1: potassium hydrogen persulfate / methanol; water / 12 h / 0 - 20 °C / Inert atmosphere 2.1: n-butyllithium / tetrahydrofuran; hexane / 0.42 h / -78 - 0 °C / Inert atmosphere 2.2: -78 - 20 °C / Inert atmosphere 3.1: water; dihydrogen peroxide; sodium hydroxide / tetrahydrofuran; hexane / 0.33 h / 20 °C / Inert atmosphere View Scheme

manganese(IV) oxide; acetyl chloride in N,N-dimethyl-formamide T=-5 - 20°C;