1: lithium aluminum hydride / diethyl ether / 3 h / -10 °C 2: p-toluenesulfonic acid / 100 to 200 deg C (distillation at 25 mmHg) View Scheme

1: 71.1 percent / lithium aluminum hydride / tetrahydrofuran / 0.33 h / 0 °C 2: lithium aluminum hydride / diethyl ether / 3 h / -10 °C 3: p-toluenesulfonic acid / 100 to 200 deg C (distillation at 25 mmHg) View Scheme

toluene-4-sulfonic acid 100 to 200 deg C (distillation at 25 mmHg); Yield given;