1: 92 percent / K2CO3 / diethyl ether; acetone / 20 °C 2: 80 percent aq. AcOH / 5 h / 108 °C 3: aq. KOH / methanol / 36 h / 55 °C View Scheme

1: 92 percent / K2CO3 / diethyl ether; acetone / 20 °C 2: 80 percent aq. AcOH / 5 h / 108 °C View Scheme

lithium hydroxide in methanol Heating;

1: K2CO3 / acetone / 50 °C 2: aq. AcOH / Heating View Scheme

potassium carbonate in diethyl ether; acetone T=20°C; Methylation;

methanol; sodium ethanolate

1: 100 percent / 1,3-dibromo-5,5-dimethylhydantoin / CHCl3 / 2 h / 20 °C 2: 99 percent / potassium carbonate / dimethylformamide / 14 h / 50 °C 3: 100 percent / Amberlyst 15E / methanol / Heating 4: 85 percent / potassium fluoride / dimethylformamide / 110 °C View Scheme

1: methanol; ethanolic sodium ethylate solution 2: aqueous hydrochloric acid 3: zinc chloride / anschliessend Behandeln mit wss. Kaliumhydrogencarbonat 4: chloroform; phosphorus (V)-chloride View Scheme