2,2'-azo-bisisobutyronitrile; tri-n-butyl-tin hydride T=80°C;

<b>Multi-step reaction with 2 steps<br /> </b>1: 88 percent / tetramethylguanidine / 5 h / Ambient temperature<br />2: 99 percent / DMAP / pyridine<br /> <br /> &nbsp;