2,2'-azo-bisisobutyronitrile; tri-n-butyl-tin hydride in benzene Heating;

<b>Multi-step reaction with 4 steps<br /> </b>1: 88 percent<br />2: LiBr / dimethylsulfoxide / Heating<br />3: LDA<br />4: 95 percent / H₂ / Lindlar's catalyst<br /> <br /> &nbsp;

<b>Multi-step reaction with 5 steps<br /> </b>1: 88 percent / LiAlH₄ <br />2: 88 percent<br />3: LiBr / dimethylsulfoxide / Heating<br />4: LDA<br />5: 95 percent / H₂ / Lindlar's catalyst<br /> <br /> &nbsp;

<b>Multi-step reaction with 3 steps<br /> </b>1: LiBr / dimethylsulfoxide / Heating<br />2: LDA<br />3: 95 percent / H₂ / Lindlar's catalyst<br /> <br /> &nbsp;