1: isopropylmagnesium chloride With lithium chloride; manganese (II) chloride in tetrahydrofuran T=-60°C; 2: 1-(2-chlorophenyl)ethan-1-one in tetrahydrofuran T=-60°C; 0.5 h;

1: With neopentylmagnesium bromide; cobalt(II) dibromide; 1,3-Diisopropyl-4,5-dihydro-3H-imidazol-1-ium tetrafluoroborate in tetrahydrofuran T=0 - 20°C; 6 h; Schlenk techniqueInert atmosphere; 2: With hydrogenchloride; water in tetrahydrofuran Inert atmosphereSchlenk technique;

diethyl ether

1: With neopentylmagnesium bromide; cobalt(II) dibromide; 1,3-Diisopropyl-4,5-dihydro-3H-imidazol-1-ium tetrafluoroborate in tetrahydrofuran T=0 - 20°C; 6 h; Schlenk techniqueInert atmosphere; 2: With hydrogenchloride; water in tetrahydrofuran Inert atmosphereSchlenk technique; Overall yield = 68 percent;

aluminium trichloride; acetyl chloride in dichloromethane at 25°C;;

sodium hydroxide; bromine in water T=0°C; 1 h;