1: hydrazine hydrate / methanol / 1.33 h / Heating 2: p-toluenesulfonic acid / methanol / 16 h / 20 °C 3: 77 percent / Et3N / tetrahydrofuran / 1.33 h / Heating View Scheme

hydrazine hydrate in methanol Substitution; 1.33333 h; Heating;