1: 59 percent / tri-n-butyltin hydride, azobisisobutyronitrile / toluene / Heating 2: 85 percent / 1 M tetra-n-butylammonium fluoride / tetrahydrofuran 3: 77.5 percent / H2 / 10percent Pd/C / ethanol / 775.7 Torr 4: 80 percent / ammonia / methanol / Heating View Scheme

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

Multi-step reaction with 2 steps 1: 59 percent / tri-n-butyltin hydride, azobisisobutyronitrile / toluene / Heating2: 85 percent / 1 M tetra-n-butylammonium fluoride / tetrahydrofuran  

Multi-step reaction with 3 steps 1: 59 percent / tri-n-butyltin hydride, azobisisobutyronitrile / toluene / Heating2: 85 percent / 1 M tetra-n-butylammonium fluoride / tetrahydrofuran3: 77.5 percent / H2 / 10percent Pd/C / ethanol / 775.7 Torr