sodium hydroxide in ethanol 4 h; Ambient temperature;

1: 1.) Et3O(1+)*BF4(1-) / 1.) dichloroethane; 2.) heating at reflux overnight 2: 1.) potassium diisopropylamide / 1.) THF, -78 deg C, 2.) 2-3 h up to -20+/-10 deg C 3: NH2NH2 / acetic acid; aq. ethanol / 12 h / 53 °C View Scheme

in tetrahydrofuran 2 h; Heating;