2-Fluoro-4-(trifluoromethyl)aniline (CAS number 69409-98-9) is an aniline derivate, bearing a fluorine and a trifluoromethyl at 2- and 4-positions. The ortho-substituted fluorine can perform nucleophilic aromatic substitution, making 2-fluoro-4-(trifluoromethyl)aniline an excellent precursor for bicyclic heterocycles, such as quinoxalines and quinoline, as well as tricyclic heterocycles such as benzoimidazotriazines, phenazines and phenoxazines. 2-Fluoro-4-(trifluoromethyl)aniline can be used as a building block for ocfentanil derivatives as an analgesic.
2-Fluoro-4-(trifluoromethyl)aniline is also used to synthesize triarylmethane derivatives with para-quinone methides via conjugated addition.