(C2H5){CH(CH3)2}2N in diethyl ether byproducts: HF; soln. of the ethyl(isopropyl)amine and a soln. of the 2,4,6-tri-t-butylaniline added dropwise to a soln. of the BF3*OEt2 at 0°C, warmed to room temp., stirred for 2 d; ppt. filtered off, solvent removed in vac., sublimed (0.01 mbar); elem. anal.;

in diethyl ether react. 2,4,6-tri-t-butylanilidolithium with BF3*(OEt2) in OEt2 at 25°C for 12 h; product filtered and crystd. at -30°C from concd. filtrate followed by sublimation; elem. anal.;