1: 75 percent / H2NNH2*H2O, 10percent Pd/C / ethanol; benzene / 1 h / Heating 2: benzene / 1.42 h / Heating 3: benzene / 1.5 h / Heating View Scheme

1: benzene / 1.42 h / Heating 2: benzene / 1.5 h / Heating View Scheme

in benzene 1.5 h; Heating; Yield given;