1: With azobisisobutyronitrile; tri-n-butyl-tin hydride in 1,4-dioxane 2 h; Heating; 2: With ammonia in methanol T=20°C; 24 h;

1: 55 percent / NH3 / methanol / 24 h / 20 °C 2: 90 percent / tributyltin hydride; α,α'-azobisisobutyronitrile / dioxane / 2 h / Heating View Scheme