1: 78 percent / tetrahydrofuran / 4 h / -5 - 10 °C 2: CuCl2, CuO / acetone / 1 h / Heating 3: hydrure de lithium aluminium / diethyl ether / 3 h / Ambient temperature View Scheme

<b>Multi-step reaction with 2 steps<br /> </b>1: 95 percent / LDA / tetrahydrofuran / -78 &deg;C<br />2: H₂S, CF₃COOH / dimethylformamide; acetonitrile / 5 h<br /> <br /> &nbsp;

<b>Multi-step reaction with 2 steps<br /> </b>1: 95 percent / LDA / tetrahydrofuran / -78 &deg;C<br />2: H₂S, CF₃COOH / dimethylformamide; acetonitrile / 5 h<br /> <br /> &nbsp;