1.1: potassium hydroxide; potassium permanganate / water / 0.5 h / 60 - 100 °C 2.1: 2,2,6,6-tetramethylpiperidinyl-lithium / tetrahydrofuran / 4 h / -50 °C 2.2: 1 h / -50 - 20 °C / pH < 1 3.1: boron trichloride / dichloromethane / 2 h / 0 °C / |Inert atmosphere 4.1: titanium tetrachloride / dichloromethane / 22 h / -10 - 23 °C / |Inert atmosphere 5.1: silver nitrate; dihydrogen peroxide / acetonitrile / 15 h / 50 °C / |Reflux View Scheme

sodium hydroxide

1: aqueous NaOH 2: aqueous NaOH View Scheme

potassium dichromate; sulfuric acid