iodine; nitric acid in acetic acid T=14 - 16°C;

1: 4 percent / 230 °C 2: 14 percent / 66percent nitric acid, I2 / acetic acid / 14 - 16 °C View Scheme

1: 1.) 48percent aq. HBr, 2.) dimethyl sulfate, K2CO3 / 1.) reflux, 3 h, 2.) acetone, reflux, 18 h 2: 14 percent / 66percent nitric acid, I2 / acetic acid / 14 - 16 °C View Scheme