These common heterocyclic compound, 58458-10-9, name is 3-Amino-2-bromobenzotrifluoride, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route. category: bromides-buliding-blocks
An ice-cold solution of NaNO2 (0.15 g) in water (0.5 mL) is added to a mixture of 2-bromo-3-trifluoromethyl-aniline (0.48 g), concentrated H2SO4 (2 mL), and water (1.8 mL) at ca. 5 C. The mixture is stirred in the cooling bath for 20 min and then poured into a solution of KI (0.56 g) and I2 (0.56 g) in water (0.5 mL). After gas evolution ceases, the mixture is heated to 40 C. and stirred at this temperature for 1 h. The mixture is cooled to room temperature and aqueous Na2SO3 solution is added. The resulting mixture is extracted with ethyl acetate, and the combined extracts are dried (Na2SO4) and concentrated. The solvent is evaporated and the residue is chromatographed (cyclohexane/ethyl acetate 95:5?90:10) to give the title compound.
The synthetic route of 3-Amino-2-bromobenzotrifluoride has been constantly updated, and we look forward to future research findings.
Reference:
Patent; BOEHRINGER INGELHEIM INTERNATIONAL GMBH; ECKHARDT, Matthias; US2014/221349; (2014); A1;,
Bromide – Wikipedia,
bromide – Wiktionary