1: With hydrazine in ethanol Heating / reflux; 2: With hydrogenchloride in ethanol; water T=50°C; 0.5 h; 3: With sodium hydroxide in ethanol; water T=0°C; pH=10 - 12;

1: With sodium hydride in N,N-dimethyl-formamide T=25 - 70°C; 2: With hydrazine in ethanol 12 h; Heating / reflux;

ammonium hydroxide; nickel monoaluminide in tetrahydrofuran; methanol; toluene

ammonium hydroxide; hydrogen; nickel in methanol