hydrazine hydrate in ethanol 2.5 h; Heating;

1: 1.) n-BuLi / 1.) hexane, THF, -78 deg C, 1 h, 2.) hexane, THF, from -78 deg C to RT, 3.5 h 2: H2N-NH2*H2O / aq. ethanol / 2.5 h / Heating View Scheme