1: 91 percent / ethanethiol, NaH / dimethylformamide / 3 h / Heating 2: 62.4 percent / N-bromosuccinimide (NBS) / CCl4 / 4 h / Ambient temperature 3: 31 percent / salcomine, O2 / dimethylformamide / 20 h / Ambient temperature 4: 97 percent / Pd(PPh3)4, 2 N aq. Na2CO3 / tetrahydrofuran / 0.17 h / 90 °C 5: 80 mg / HClO4 / CH2Cl2 / 2 h / Ambient temperature View Scheme

1: 91 percent / ethanethiol, NaH / dimethylformamide / 3 h / Heating 2: 62.7 percent / salcomine, O2 / dimethylformamide / 14 h View Scheme