1: With potassium carbonate in water T=10 - 20°C; 2.5 h; 2: With acetic acid; hydrazine in water T=0°C; pH=7; 1.5 h; Heating / reflux;

acetic acid in water 1.5 h; Heating;

1: 1.) N-chlorosuccinimide, pyridine; 2.) Et3N / 1.) chloroform, 60 deg C, 30 min; 2.) 40-50 deg C, 20 min 2: 90 percent / molybdenum hexacarbonyl / acetonitrile; H2O / Heating 3: 85 percent / 99percent hydrazine hydrate / aq. ethanol / 2 h / Ambient temperature 4: 85 percent / 10percent HCl / aq. ethanol / 2 h / Heating View Scheme

1: 85 percent / 99percent hydrazine hydrate / aq. ethanol / 2 h / Ambient temperature 2: 85 percent / 10percent HCl / aq. ethanol / 2 h / Heating View Scheme

1: 90 percent / molybdenum hexacarbonyl / acetonitrile; H2O / Heating 2: 85 percent / 99percent hydrazine hydrate / aq. ethanol / 2 h / Ambient temperature 3: 85 percent / 10percent HCl / aq. ethanol / 2 h / Heating View Scheme

1: 1) K2CO3, 2) AcOH, N2H4*H2O / 1) water, 2.5 h, r.t., 2) 2 h, reflux 2: 85 percent / AcOH / H2O / 1.5 h / Heating View Scheme

acetic acid; hydrazine T=100°C;

hydrazine hydrate in ethanol 65 h; Heating;

1: With trichlorophosphate T=100°C; 1 h; 2: With sodium hydroxide in water T=0°C; pH=7;