pyridine T=50°C; 6 h;

1: 92 percent / 98percent hydrazine hydrate / dioxane; propan-2-ol / 0.5 h / Heating 2: 71 percent / Ph3P, Et3N, dibromotetrachloroethane / toluene / 4 h / 80 °C View Scheme

hydrazine hydrate in 1,4-dioxane; isopropyl alcohol 0.5 h; Heating;