hydrogen sulfide in ethanol; ethyl acetate; Petroleum ether

1: 98 percent / 0.5 h 2: 85 percent / 80percent AcOH / Heating 3: 90 percent / aq. NaOH / methanol / 1 h / Heating 4: 83 percent / dicyclohexylcarbodiimide / tetrahydrofuran / 14 h / 15 °C 5: 50 percent / lithium hexamethyldisilazide / tetrahydrofuran / 96 h / Heating View Scheme

1: 98 percent / 0.5 h 2: 85 percent / 80percent AcOH / Heating 3: 90 percent / aq. NaOH / methanol / 1 h / Heating View Scheme

1: 98 percent / 0.5 h 2: 85 percent / 80percent AcOH / Heating 3: 94 percent / sodium bis(methoxyethoxy)aluminium hydride / tetrahydrofuran / Heating View Scheme