1: With N,N,N',N,-tetramethylethylenediamine; sec.-butyllithium in tetrahydrofuran T=-90°C; 0.583333 h; 2: With 1,2,2-trichloro-1,1,2-trichloro-ethane in tetrahydrofuran T=-78°C; 20 h; 3: With hydrogenchloride; hexane in tetrahydrofuran; diethyl ether; water pH=1 - 2;

hydrogenchloride; N,N,N',N,-tetramethylethylenediamine; sec.-butyllithium in tetrahydrofuran; water

n-butyllithium in tetrahydrofuran; hexane

thionyl chloride

1.1: borane-THF / tetrahydrofuran / 0 °C / Reflux 1.2: Cooling with ice 2.1: oxalyl dichloride; dimethyl sulfoxide / dichloromethane / 1 h / -78 - -40 °C 2.2: -40 - 20 °C View Scheme

in chloroform

borane-THF in tetrahydrofuran T=-15 - 50°C; 5.33333 h; Inert atmosphere;