potassium carbonate in acetone 22 h; Reflux;

potassium hydroxide

(methylation);

sulfuric acid T=150°C; durch kurzes Erhitzen (10 min);

1.1: N-bromosuccinmide / tetrachloromethane / 30 h / |Reflux 2.1: acetic acid; water / 24 h / |Reflux 3.1: pyridinium chlorochromate / dichloromethane / 20 - 25 °C 4.1: AlCl3, aluminium chloride / dichloromethane / 20 °C / |Reflux 4.2: |Cooling with ice View Scheme