triethylamine in dichloromethane T=0 - 20°C; 1 h;

1: HNO3, H2SO4 / 1 h / 10 - 20 °C 2: NaHCO3, methanol / 16 h / Ambient temperature 3: 96 percent / H2 / 10percent Pd/C / ethyl acetate / 27 h / 50 - 60 °C View Scheme

1: With sulfuric acid; nitric acid T=0°C; 0.25 h; 2: With sodium hydrogencarbonate in methanol T=20°C; 16 h;