1.1: triethylsilane / dichloromethane / 20 - 25 °C 1.2: 3 h / -10 - 0 °C 1.3: 2.16 h / 25 °C 2.1: potassium carbonate / methanol / 28 °C 2.2: 2.4 h / 15 - 25 °C 2.3: 2 h / 25 - 90 °C 3.1: hydrogenchloride / methanol; water / 5 h / 64 °C 3.2: 28 °C View Scheme

1.1: triethylsilane / dichloromethane / 0.17 h / 30 °C 1.2: 2 h / 0 - 30 °C 2.1: potassium iodide / N,N-dimethyl-formamide / 2 h / 30 - 102 °C 3.1: hydrazine hydrate / methanol / 1.17 h / 30 - 65 °C View Scheme

1.1: triethylsilane / dichloromethane / 20 - 25 °C 1.2: 3 h / -10 - 0 °C 1.3: 2.16 h / 25 °C 2.1: potassium carbonate / methanol / 28 °C 2.2: 2.4 h / 15 - 25 °C 2.3: 2 h / 25 - 90 °C 3.1: hydrogenchloride / methanol; water / 4 h / 30 - 70 °C View Scheme