1: 1.) POCl3, 2.) KOAc / 1.) CH2Cl2, RT, 20 h, 2.) CH2Cl2, water, reflux, 20 min 2: 53 percent / sulfur / decahydronaphthalene / 5.5 h / Heating View Scheme

1: 95 percent / ammonium formate / Pd/C / tetrahydrofuran; methanol / 20 °C 2: 56 percent / KOH; NH2NH2*H2O / ethane-1,2-diol / 1 h / Heating View Scheme

potassium acetate; trichlorophosphate 1.) CH2Cl2, RT, 20 h, 2.) CH2Cl2, water, reflux, 20 min; Yield given. Multistep reaction;