n-butyllithium in tetrahydrofuran; diethyl ether; hexane byproducts: LiBr; A soln. of o-C6H4Br(NMe2) in Et2O was added dropwise to n-BuLi in hexane at 0°C, after 1 h a soln. of SbCl3 in THF was added, the mixt. was refluxed for 30 min (N2 atm.);; hydrolysis the organic layer was sepd., dried and evapd., recrystd. from ethanol and acetone; elem. anal.;;