triethylamine in dichloromethane 24 h; Heating;

1: 79 percent / Et3N / diethyl ether / 16.5 h / -78 - 20 °C 2: 25 percent / NaBH4, LiBr / tetrahydrofuran / 20 h / Heating 3: 88 percent / Et3N / CH2Cl2 / 24 h / Heating View Scheme

1: 25 percent / NaBH4, LiBr / tetrahydrofuran / 20 h / Heating 2: 88 percent / Et3N / CH2Cl2 / 24 h / Heating View Scheme

1: 74 percent / Cl2, HCl / ethanol / 0 °C 2: 79 percent / Et3N / diethyl ether / 16.5 h / -78 - 20 °C 3: 25 percent / NaBH4, LiBr / tetrahydrofuran / 20 h / Heating 4: 88 percent / Et3N / CH2Cl2 / 24 h / Heating View Scheme