toluene-4-sulfonic acid in isopropyl alcohol 1 h; Reflux;

palladium 10 on activated carbon; hydrogen in ethanol T=20°C; P=760.051 Torr;

1: With diethylamino-sulfur trifluoride in dichloromethane T=-78°C; 3 h; Inert atmosphere; 2: With 10 palladium on activated carbon; hydrogen in methanol T=20°C; 4 h; Inert atmosphere;