tri-n-butyl-tin hydride; 2,2'-azo-bisisobutyronitrile in various solvent(s) 3 h; Irradiationregioselectivity, competition constant; and with TBTD; Product distribution;

tri-n-butyl-tin hydride; 2,2'-azo-bisisobutyronitrile in various solvent(s) 3 h; Irradiationregioselectivity, competition constant; and with TBTD; Product distribution;