1: 2,6-lutidine / CH2Cl2 / 0 - 20 °C 2: 2N NaOH / tetrahydrofuran / 1 h / 20 °C 3: 63 percent / toluene; tetrahydrofuran / -45 - 20 °C View Scheme

<b>Multi-step reaction with 2 steps<br /> </b>1: Na₂CO₃*1.5H₂O₂ / dichloromethane / 3 h<br />2: 1,2-dichloro-ethane / 2 h / 20 &deg;C / |Irradiation<br /> <br /> &nbsp;