hydrogen bromide in acetic acid 23 h; Heating;

1: 94 percent / dioxane; benzene / Ambient temperature 2: 68 percent / 18percent aq. NH2NH2 / Ambient temperature 3: 2.) Na2CO3 / 1.) water, reflux, 1.5 h, 2.) water, reflux, 1 h 4: 75 percent / 48percent HBr / acetic acid / 23 h / Heating View Scheme

1: 2.) Na2CO3 / 1.) water, reflux, 1.5 h, 2.) water, reflux, 1 h 2: 75 percent / 48percent HBr / acetic acid / 23 h / Heating View Scheme

1: 68 percent / 18percent aq. NH2NH2 / Ambient temperature 2: 2.) Na2CO3 / 1.) water, reflux, 1.5 h, 2.) water, reflux, 1 h 3: 75 percent / 48percent HBr / acetic acid / 23 h / Heating View Scheme