carbon tetrabromide; triphenylphosphine in benzene T=60°C;

1: 60 percent / KOH / ethanol / 1 h / Heating 2: 68 percent / pyridine / 1.5 h / Heating 3: 48 percent / LiAlH4 / diethyl ether / 3 h / Heating 4: 72 percent / CBr4, PPh3 / benzene / 60 °C View Scheme

1: 48 percent / LiAlH4 / diethyl ether / 3 h / Heating 2: 72 percent / CBr4, PPh3 / benzene / 60 °C View Scheme

1: 68 percent / pyridine / 1.5 h / Heating 2: 48 percent / LiAlH4 / diethyl ether / 3 h / Heating 3: 72 percent / CBr4, PPh3 / benzene / 60 °C View Scheme