hydrogen sulfide; diethylamine in 1,4-dioxane T=25°C; 30 h;

1: 81 percent / p-TsCl / CH2Cl2 / 120 h / 25 °C 2: 82 percent / HNO3 (70percent) / H2SO4 / 0.17 h / 25 °C 3: 88 percent / H2S, Et2NH / dioxane / 30 h / 25 °C View Scheme

1: 82 percent / HNO3 (70percent) / H2SO4 / 0.17 h / 25 °C 2: 88 percent / H2S, Et2NH / dioxane / 30 h / 25 °C View Scheme