1: lithium diisopropyl amide / tetrahydrofuran / 1.25 h / -78 °C 2: n-butyllithium / tetrahydrofuran / 0.5 h / -78 °C / |Inert atmosphere 3: iodine cloride / dichloromethane / 48 h / -78 - 20 °C / |Inert atmosphere 4: tetrabutylammomium bromide; sodium dithionite; potassium hydroxide / tetrahydrofuran; water / 40 °C / |Inert atmosphere 5: bis(1,5-cyclooctadiene)nickel (0); cyclooctadiene; [2,2']bipyridinyl / N,N-dimethyl-formamide; toluene / 2 h / 65 - 85 °C / |Schlenk technique; |Darkness View Scheme

nickel

2: copper powder View Scheme

sodium hydroxide

tellurium; oxygen 1.) THF, pentane, room temperature, 5 h; 2.) 1 h; Yield given. Multistep reaction;

T=260°C;

bei der elektrolytischen Oxydation;

1: dioxane; HCl 2: aqueous acetic acid 3: K2cr2O7; aqueous acetic acid View Scheme

bromine; acetic acid in chloroform

1: dioxane; HCl 2: LiAlH4 View Scheme