Steric and electronic effects in the synthesis of biaryls and their heterocyclic congeners using intramolecular free radical [1,5] ipso substitution reactions

Article abstract of DOI:10.1016/S0040-4039(96)02236-8

Hindered biaryls and heterobiaryls are even easier to prepare by intramolecular free radical [1,5] ipso substitution using sulfonamide and sulfonate tethering chains, since the introduction of either electron releasing or electron withdrawing groups ortho