n-butyllithium; N,N,N',N,-tetramethylethylenediamine 1.) THF, 5-15 deg C, sonication, 2 h, 2.) r.t., several hours; Yield given. Multistep reaction. Yields of byproduct given;

n-butyllithium; N,N,N',N,-tetramethylethylenediamine 1.) THF, 5-15 deg C, sonication, 2 h, 2.) r.t., several hours; Yield given. Multistep reaction. Yields of byproduct given;

n-butyllithium; N,N,N',N,-tetramethylethylenediamine 1.) THF, 5-15 deg C, sonication, 2 h, 2.) r.t., several hours; Yield given. Multistep reaction. Yields of byproduct given;