The 1,Br-3,5-bis-(trifluoromethyl)-benzene was prep. , using 1,3-dibromo-5,5-dimethyl-imidazolidine-2,4-dione and 1,3-bis-(trifluoromethyl)-benzene as material, and was synthesized in sulphuric acid. With a yield of 98% and selectivity of 99%.

• 3,5-双三氟甲基苯甲酸[CAS:725-89-3]的合成是先通过1,3-二溴-5,5-二甲基乙内酰脲,与1,3-双三氟甲基苯生成3,5-双三氟甲基溴苯,收率98%25,选择性99%25。