dihydrogen peroxide; sodium hydroxide in hexane; water T=0°C; 24 h;

1: 83 percent / NaI, K2CO3 / acetone / 12 h / Heating 2: 1.) 10percent aq. NaOH, 2.) 10percent aq. H2SO4 / 1.) ethanol, room temp., 5 h, 2.) reflux, 12 h View Scheme

1: zirconocene dichloride / hexane / 3 h / 40 °C / |Inert atmosphere 2: boron trifluoride diethyl etherate / hexane / -10 - 20 °C / |Inert atmosphere 3: sodium hydroxide; dihydrogen peroxide / hexane; water / 24 h / 0 °C View Scheme

18-crown-6 ether 1.) THF, RT, 15 min, 2.) THF, RT, 3 h; Yield given. Multistep reaction;

sodium hydroxide; sulfuric acid 1.) ethanol, room temp., 5 h, 2.) reflux, 12 h; Yield given. Multistep reaction;