1: With phosphorus pentachloride in dichloromethane T=0°C; intramolecular Friedel-Crafts cyclisation; Inert atmosphere; 2: With tin(IV) chloride in dichloromethane T=0°C; intramolecular Friedel-Crafts cyclisation; Inert atmosphere; regioselective reaction;

1: With phosphorus pentachloride in dichloromethane T=0°C; intramolecular Friedel-Crafts cyclisation; 1 h; Inert atmosphere; 2: With tin(IV) chloride in dichloromethane T=20°C; intramolecular Friedel-Crafts cyclisation; 3 h; Inert atmosphere; regioselective reaction;

trifluoroacetic acid; trifluoroacetic anhydride in dichloromethane intramolecular Friedel-Crafts cyclisation; 0.5 h; Inert atmosphereCooling with ice; regioselective reaction;

1: With phosphorus pentachloride in dichloromethane T=0°C; intramolecular Friedel-Crafts cyclisation; 1 h; Inert atmosphere; 2: With tin(IV) chloride in dichloromethane T=20°C; intramolecular Friedel-Crafts cyclisation; 3 h; Inert atmosphere; regioselective reaction;