4-Bromo-2-tert-butylaniline is an intermediate in the synthesis of 1-(2-tert-Butyl-4-bromophenyl)pyrrolidin-2-one (T135885), which is an intermediate in the preparation of [1,1':3',1'']terphenyl-4-carboxylic acid and esters as ligands modulating retinoic acid receptors (RAR).