potassium hydroxide; hydrogen sulfide; ammonia; dihydrogen peroxide in ethanol; dichloromethane

iodine; potassium carbonate in diethyl ether 2 h; Heating;

1: 94 percent / NH3, NH4NO3 / ethanol / 16 h / Heating 2: 78 percent / H2S, sodium sulfide nonahydrate, tetrabutylammonium chloride / benzene; H2O / 48 h / 70 °C 3: 93 percent / potassium carbonate, iodine / diethyl ether / 2 h / Heating View Scheme

1: NaH / tetrahydrofuran 2: 94 percent / NH3, NH4NO3 / ethanol / 16 h / Heating 3: 78 percent / H2S, sodium sulfide nonahydrate, tetrabutylammonium chloride / benzene; H2O / 48 h / 70 °C 4: 93 percent / potassium carbonate, iodine / diethyl ether / 2 h / Heating View Scheme

1: 78 percent / H2S, sodium sulfide nonahydrate, tetrabutylammonium chloride / benzene; H2O / 48 h / 70 °C 2: 93 percent / potassium carbonate, iodine / diethyl ether / 2 h / Heating View Scheme