nickel in cyclohexane 2 h; Heating;

<b>Multi-step reaction with 2 steps<br /> </b>1: 79 percent / buthyllithium / tetrahydrofuran; hexane / -45 - -10 &deg;C<br />2: 67 percent / butyllithium / tetrahydrofuran; hexane / 12 h / -10 &deg;C<br /> <br /> &nbsp;