1: 61 percent / Bu3SnH, AIBN / benzene / Heating 2: 1.) Me3SiI, ZnI2, 2.) DBU / 1.) CH2Cl2, 25 deg C, 2.) ether, 25 deg C View Scheme

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