1.1: 74 percent / NaOH / tetrahydrofuran / 20 h / 20 °C 2.1: acetonitrile / 20 °C 2.2: 85 percent / PPh3; Et3N / acetonitrile / 3 h / 20 °C 3.1: 91 percent / LiAlH4 / tetrahydrofuran / 5 h / 0 - 20 °C 4.1: CBr4; PPh3; Et3N / acetonitrile / 13 h / 20 °C 5.1: 573 mg / acetonitrile / 2 h / Heating View Scheme

1.1: acetonitrile / 20 °C 1.2: 85 percent / PPh3; Et3N / acetonitrile / 3 h / 20 °C 2.1: 91 percent / LiAlH4 / tetrahydrofuran / 5 h / 0 - 20 °C 3.1: CBr4; PPh3; Et3N / acetonitrile / 13 h / 20 °C 4.1: 573 mg / acetonitrile / 2 h / Heating View Scheme

1: CBr4; PPh3; Et3N / acetonitrile / 13 h / 20 °C 2: 573 mg / acetonitrile / 2 h / Heating View Scheme