1.1: ammonium chloride; hydrogenchloride; iron / ethanol; water / 3.5 h / 55 - 65 °C 2.1: tetrahydrofuran / 24 h / 20 °C 3.1: bromo-tris(1-pyrrolidinyl)phosphonium hexafluorophosphate; triethylamine / 1,4-dioxane / 2 h / 20 °C / |Inert atmosphere 3.2: 0.5 h / 20 °C / |Inert atmosphere 3.3: 24 h / 100 °C / |Inert atmosphere View Scheme