1.1: methanol / 8 h / |Reflux 2.1: magnesium sulphate heptahydrate / dichloromethane; methanol 2.2: 0.07 h / 100 °C / 1551.49 - 2585.81 Torr / |Microwave irradiation View Scheme

1: ammonium cerium (IV) nitrate; silica gel / 24 h / 20 °C 2: tetrafluoroboric acid / 0 - 70 °C 3: ammonium cerium (IV) nitrate; silica gel / 20 °C 4: dichloromethane / 20 °C 5: diethyl ether; tetrahydrofuran / -78 °C View Scheme

<b>Multi-step reaction with 3 steps<br /> </b>1: sodium; ethanol / diethyl ether / 4 h<br />2: sodium acetate / methanol; water / 0 &deg;C<br />3: hydrogenchloride; acetic acid / water / |Reflux<br /> <br /> &nbsp;