pyridine; air; 2,2'-azo-bisisobutyronitrile; tri-n-butyl-tin hydride 1.) toluene, 60 deg C, 3 h; Yield given. Multistep reaction. Yields of byproduct given. Title compound not separated from byproducts;

pyridine; air; 2,2'-azo-bisisobutyronitrile; tri-n-butyl-tin hydride 1.) toluene, 60 deg C, 3 h; Yield given. Multistep reaction. Yields of byproduct given. Title compound not separated from byproducts;