tetra-ethyl-ammonium ethylsulfate in sulfuric acid T=27 - 30°C; 14 h; electrolitic reduction with lead electrodes; Yield given;

1: 2 h / 80 °C 2: phosphorus pentasulfide / dioxane / 2 h / 60 °C 3: tetraethylammonium ethylsulfate / aq. H2SO4 / 14 h / 27 - 30 °C / electrolitic reduction with lead electrodes View Scheme

1: 2 h / 80 °C 2: phosphorus pentasulfide / dioxane / 2 h / 60 °C 3: tetraethylammonium ethylsulfate / aq. H2SO4 / 14 h / 27 - 30 °C / electrolitic reduction with lead electrodes View Scheme

1: phosphorus pentasulfide / dioxane / 2 h / 60 °C 2: tetraethylammonium ethylsulfate / aq. H2SO4 / 14 h / 27 - 30 °C / electrolitic reduction with lead electrodes View Scheme