Synthetic Route of 1003-98-1,Some common heterocyclic compound, 1003-98-1, name is 2-Bromo-4-fluoroaniline, molecular formula is C6H5BrFN, 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.
30.0 g (0.172 mol) 4-chloro-3-fluoro-phenylboronic acid and 29.7 g (0.156 mol) 2-bromo-4-fluoroaniline, in an oxygen-free atmosphere, are suspended in a mixture of 170 ml toluene, 17 ml ethanol and 160 ml of saturated sodium carbonate solution in an argon atmosphere. 3.6 g tetrakis(triphenylphosphine) palladium (0) is added to the reaction mixture, and it is stirred for 12 hours at 80 C. The organic phase is separated and the aqueous phase is extracted with acetic acid ethyl ester. The combined organic phases are concentrated, and the residue is chromatographed with cyclohexane/acetic acid ethyl ester (3:1) on silica gel.The reaction yields 26.1 g (69.7% of the theoretical yield) of 4′-chloro-3′,5-difluorobiphenyl-2-amine [log P (pH 2.3)=3.18].
These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 2-Bromo-4-fluoroaniline, its application will become more common.
Reference:
Patent; Bayer Cropscience AG; US2008/242708; (2008); A1;,
Bromide – Wikipedia,
bromide – Wiktionary