nitric acid in acetic acid T=100°C;

1: 30 percent / concd HCl, NaClO3 / 2 h / 50 - 60 °C 2: 82 percent / tetrahydrofuran; methanol; H2O / 0.03 h / Heating 3: 50 percent / concd HNO3 / acetic acid / 100 °C View Scheme