sodium hydroxide; hydrazine; 1,2-bis-(2-hydroxyethoxy)-ethane T=180°C;

sulfuric acid; hydrogen; palladium in acetic acid

1: 27.6 g / nitric acid (fuming) / 8 h / -10 - -9 °C 2: 8.73 g / tin(II) chloride dihydrate, conc. HCl / 0.17 h / Heating 3: 7.11 g / NaOH, NH2NH2*H2O / various solvent(s) / 1 h / 100 °C View Scheme

(i) NaHCO3, acetone, (ii) /BRN= 102549/; Multistep reaction;