1: 92 percent / HCl gas / dioxane / 1 h / Heating 2: 48 percent / chromium trioxide, 35percent H2SO4 / acetone; H2O / 2 h / Ambient temperature 3: 60 percent / hydrazin hydrate 98percent / ethanol / 1 h / Heating View Scheme

1: 92 percent / HCl gas / dioxane / 1 h / Heating 2: 48 percent / chromium trioxide, 35percent H2SO4 / acetone; H2O / 2 h / Ambient temperature View Scheme

1: 92 percent / HCl gas / dioxane / 1 h / Heating 2: 48 percent / chromium trioxide, 35percent H2SO4 / acetone; H2O / 2 h / Ambient temperature 3: 60 percent / hydrazin hydrate 98percent / ethanol / 1 h / Heating 4: 64 percent / 3 h / Heating View Scheme

Multi-step reaction with 2 steps 1: 92 percent / HCl gas / dioxane / 1 h / Heating2: 24 percent / chromium trioxide, 35percent H2SO4 / acetone; H2O / 2 h / Ambient temperature