lithium hydride in N,N-dimethyl-formamide Ambient temperature; Yield given. Yields of byproduct given;

pyridine; sodium bromide 1.) DMF, electrolysis: Pt as working el., Ag/Ag(+) in CH3CN as reference el., room temp., 2.) room temp.; Yield given. Multistep reaction. Yields of byproduct given;

lithium hexamethyldisilazane in tetrahydrofuran; N,N-dimethyl-formamide T=-40 - 0°C; 6 h;

1: 97 percent / MeONa / methanol 2: LHMDS / dimethylformamide / -40 °C View Scheme