N,N,N',N,-tetramethylethylenediamine; sec.-butyllithium 1.) THF, -100 deg C, 5 min, 2.) THF, from -70 deg C to -60 deg C; Yield given. Multistep reaction. Yields of byproduct given. Title compound not separated from byproducts;

N,N,N',N,-tetramethylethylenediamine; sec.-butyllithium in tetrahydrofuran T=-65°C;

N,N,N',N,-tetramethylethylenediamine; sec.-butyllithium 1.) THF, -100 deg C, 2.) THF, from -70 deg C to -60 deg C, 1 h; Yield given. Multistep reaction. Yields of byproduct given;

N,N,N',N,-tetramethylethylenediamine; sec.-butyllithium; magnesium bromide in tetrahydrofuran 1.) -100 deg C, 5 min; 2.) 20 min;

sec.-butyllithium; magnesium bromide 1.) THF, -100 deg C, 2.) THF, form -70 deg C to -60 deg C; Yield given. Multistep reaction;