1: With n-butyllithium in diethyl ether; hexane T=-78°C; 1 h; 2: With poly[4-(dibutyliodostannyl)butyl]styrene in diethyl ether; hexane T=20°C; 18 h; 3: With bromine in diethyl ether; hexane; dichloromethane T=-78 - 20°C; 2 h;

sodium perborate; ammonium heptamolybdate; potassium bromide in acetic acid T=20°C; Bromination; 1 h;

3-chloro-benzenecarboperoxoic acid in 1,2-dichloro-ethane T=70°C; 2 h;

in water; acetic acid T=55°C; 4 h;

1: With hydrogenchloride; sodium nitrite T=0°C; 0.5 h; 2: With potassium iodide in water T=20°C; 12 h; Further stages.;