1: 87 percent / NaNO2, HBF4 (34percent) / H2O / 0.5 h / -8 - -2 °C 2: 115 - 120 °C 3: 80 percent / hydrazine hydrate / ethanol / 1 h / 0 °C 4: 57 percent / 8 h / Heating 5: H2 / Pd-C, 10percent / ethanol / 1 h 6: 20 percent / PPA / 0.12 h / 120 °C View Scheme

1: 80 percent / hydrazine hydrate / ethanol / 1 h / 0 °C 2: 57 percent / 8 h / Heating 3: H2 / Pd-C, 10percent / ethanol / 1 h 4: 20 percent / PPA / 0.12 h / 120 °C View Scheme

1: 57 percent / 8 h / Heating 2: H2 / Pd-C, 10percent / ethanol / 1 h 3: 20 percent / PPA / 0.12 h / 120 °C View Scheme

1: H2 / Pd-C, 10percent / ethanol / 1 h 2: 20 percent / PPA / 0.12 h / 120 °C View Scheme

PPA T=120°C; 0.116667 h;