2,2'-azo-bisisobutyronitrile; tri-n-butyl-tin hydride; magnesium 1.) benzene, 80 deg C, 1 h, 2.) MeOH, 24 h, room t.; Yield given. Multistep reaction. Yields of byproduct given;

1: 1.) n-Bu3SnH, AIBN, 2.) Mg / 1.) benzene, 80 deg C, 1 h, 2.) MeOH, 24 h, room t. 2: TFA View Scheme