2,2'-azo-bisisobutyronitrile; tri-n-butyl-tin hydride in toluene Cyclization; reduction; nitrile transfer; 1 h; Heating;

1: With 2,2'-azo-bisisobutyronitrile; tri-n-butyl-tin hydride in toluene Cyclization; reduction; nitrile transfer; 16 h; Heating; 2: With ammonium hydroxide in toluene Hydrolysis; 0.666667 h;