1: 42 percent / tributyltin hydride, azobisisobutyronitrile / toluene / 0.17 h / 110 °C 2: 88 percent / hydrogen fluoride-pyridine / acetonitrile / 2 h / Ambient temperature View Scheme

With  2,2'-azo-bisisobutyronitrile; tri-n-butyl-tin hydride in  toluene T=110°C; 0.166667 h;