tert.-butyl lithium 1.) THF, 2 h, 2.) THF, -80 deg C; Yield given. Multistep reaction. Yields of byproduct given;

N,N,N',N',N'',N''-hexamethylphosphoric triamide; lithium hexamethyldisilazane 1.) THF, -30 deg C, 1 h, 2.) THF, -30 deg C; Multistep reaction;

N,N,N',N',N'',N''-hexamethylphosphoric triamide; lithium hexamethyldisilazane 1.) THF, 1 h, 2.) THF, -30 deg C; Yield given. Multistep reaction. Yields of byproduct given;

N,N,N',N',N'',N''-hexamethylphosphoric triamide; lithium hexamethyldisilazane 1.) THF, 1 h, 2.) THF, -30 deg C; Yield given. Multistep reaction. Yields of byproduct given;