1: With 2,2'-azo-bisisobutyronitrile; tri-n-butyl-tin hydride in benzene T=80°C; Reduction; rearrangement; 0.25 h; 2: With potassium hydroxide in ethanol Hydrolysis; 1 h; Heating; Title compound not separated from byproducts;

1: With 2,2'-azo-bisisobutyronitrile; tri-n-butyl-tin hydride in benzene T=80°C; Reduction; rearrangement; 0.25 h; 2: With potassium hydroxide in ethanol Hydrolysis; 1 h; Heating; Title compound not separated from byproducts;