in ethanol 16 h; Ambient temperature;

1: 40 percent / N-bromosuccinimide, AIBN / benzene / 6 h / Irradiation 2: 1) LDA / 1) THF, -10 deg C, 1h, 2) THF, -10 deg C 3: 70 percent / pyridine / 20 h / Heating 4: 95 percent / H2NNH2*H2O / ethanol / 20 h / Ambient temperature 5: 90 percent / ethanol / 16 h / Ambient temperature View Scheme

1: 2) MnO2 / 1) Et2O, 2) CH2Cl2 2: 1) LDA / 1) THF, -10 deg C, 1h, 2) THF, -10 deg C 3: 70 percent / pyridine / 20 h / Heating 4: 95 percent / H2NNH2*H2O / ethanol / 20 h / Ambient temperature 5: 90 percent / ethanol / 16 h / Ambient temperature View Scheme

1: 1) LDA / 1) THF, -10 deg C, 1h, 2) THF, -10 deg C 2: 70 percent / pyridine / 20 h / Heating 3: 95 percent / H2NNH2*H2O / ethanol / 20 h / Ambient temperature 4: 90 percent / ethanol / 16 h / Ambient temperature View Scheme

1: 70 percent / pyridine / 20 h / Heating 2: 95 percent / H2NNH2*H2O / ethanol / 20 h / Ambient temperature 3: 90 percent / ethanol / 16 h / Ambient temperature View Scheme

1: 95 percent / H2NNH2*H2O / ethanol / 20 h / Ambient temperature 2: 90 percent / ethanol / 16 h / Ambient temperature View Scheme

1: 1) LDA / 1) THF, -10 deg C, 1h, 2) THF, -10 deg C 2: 70 percent / pyridine / 20 h / Heating 3: 95 percent / H2NNH2*H2O / ethanol / 20 h / Ambient temperature 4: 90 percent / ethanol / 16 h / Ambient temperature View Scheme