1: palladium / ethanol; cyclohexene / 0.5 h / Heating 2: 59 percent / DCC, 1-hydroxybenzotriazole / acetonitrile; dimethylformamide / -10 °C 3: palladium / ethanol / 0.5 h / Heating 4: 46 percent / dimethylformamide / 4 °C 5: 74 percent / thioanisole, trifluoroacetic acid / 1 h / Ambient temperature View Scheme

1: palladium / ethanol; cyclohexene / 0.5 h / Heating 2: 59 percent / DCC, 1-hydroxybenzotriazole / acetonitrile; dimethylformamide / -10 °C 3: palladium / ethanol / 0.5 h / Heating 4: 46 percent / dimethylformamide / 4 °C View Scheme