n-butyllithium; copper(l) chloride in tetrahydrofuran; diethyl ether; hexane under N2; dropwise addn. of BuLi in hexane to a soln. of o-carborane inether at 0-5°C with stirring; addn. of anhydr. CuCl with stirring; addn. of THF; heating at 40°C for 10 min; cooling to 0-5°C; addn. of BF4-salt; addn. of MeOH at 20°C; filtration of ppt. and washing (benzene, ether); washing of filtrates (aq. HCl, H2O) and drying over CaCl2 or Na2SO4; evapn. in vac.; TLC (Siloful, benzene-petroleum ether); recrystn. (MeOH); elem. anal.;

potassium hydroxide byproducts: H2; room temp. or boiling heat;