1.1: n-BuLi / hexane; tetrahydrofuran / 0.17 h / -100 °C 1.2: ZnCl2 / hexane; tetrahydrofuran; diethyl ether / -100 - 20 °C 2.1: aq. NaClO2; amylene; potassium hydrogen phosphate / 2-methyl-propan-2-ol / 24 h / 20 °C View Scheme

sodium hydroxide; dihydrogen peroxide in diethyl ether T=0 - 20°C; Oxidation;