aluminium trichloride in nitrobenzene T=80 - 90°C; Fries rearrangement; 0.75 h;

1: 4-(N,N-dimethlyamino)pyridine; dicyclohexyl-carbodiimide / dichloromethane / 8 h / 20 °C / Inert atmosphere 2: AlCl3, aluminium chloride / N,N-dimethyl-formamide / 3 h / 210 °C View Scheme

1: 4-(N,N-dimethlyamino)pyridine; dicyclohexyl-carbodiimide / dichloromethane / 8 h / 20 °C / Inert atmosphere 2: AlCl3, aluminium chloride / N,N-dimethyl-formamide / 3 h / 210 °C View Scheme

1: sodium hydroxide 2: AlCl3, aluminium chloride / 80 - 90 °C View Scheme