1: 92 percent / KNO3, H2SO4 conc. / 8 h / 115 °C 2: POCl3 / 1) reflux, 3 h, 2) RT, overnight 3: aq. NH3 / 0 deg C - RT 4: H2 / 5percent Pd/C / methanol / Ambient temperature View Scheme

1: 92 percent / KNO3, H2SO4 conc. / 8 h / 115 °C 2: POCl3 / 1) reflux, 3 h, 2) RT, overnight View Scheme