1: With AlCl3, aluminium chloride T=20 - 100°C; Fries rearrangement; Neat (no solvent); 2: With hydrogenchloride in water T=20°C;

1.1: n-butyllithium / tetrahydrofuran; hexane / 0.33 h / -78 °C 1.2: tetrahydrofuran / 1.5 h / -78 °C 2.1: 1.15 g / CF3CO2H / CH2Cl2 / 12 h View Scheme

1: ortho-bromo-phenol With n-butyllithium in diethyl ether; hexane T=-25 - 20°C; Inert atmosphere; 2: ethyl-α,α,α-trifluoroacetate in diethyl ether; hexane T=-90 - 20°C; 1.25 h; Inert atmosphere; 3: With hydrogenchloride in diethyl ether; hexane; water T=-5°C;

1: With sulfur T=220 - 230°C; 3.5 h; 2: With sulfuryl dichloride in dichloromethane T=20°C; 60 h;

sulfur T=205°C; 1 h;