boron tribromide in dichloromethane T=-30°C; 3 h; Schlenk technique;

1.1: trichlorophosphate / 1,2-dichloro-benzene / 3 h / 70 °C / |Cooling with ice 2.1: dihydrogen peroxide; potassium dihydrogenphosphate; sodium chlorite / tetrahydrofuran; water / 8 h / 20 °C 3.1: thionyl chloride / chloroform / 6 h / |Reflux 4.1: potassium carbonate / tetrahydrofuran / 12 h / 20 °C 5.1: sodium hydride / tetrahydrofuran; mineral oil / 20.5 h / 50 °C / |Cooling with ice; |Inert atmosphere 6.1: palladium diacetate; silver(l) oxide; potassium acetate / N,N-dimethyl-formamide / 110 °C 7.1: lithium aluminium tetrahydride / diethyl ether / 3 h / 20 °C / |Cooling with ice 7.2: 0.5 h / |Cooling with ice 8.1: pyridine; trimethylsilyl iodide / sulfolane / 20 h / 70 °C / |Inert atmosphere 9.1: sodium hydroxide; oxygen / water; acetone / 18 h / 20 °C 10.1: hydrogenchloride / tetrahydrofuran / 20 h / 60 °C View Scheme