Electric Literature of 175278-17-8,Some common heterocyclic compound, 175278-17-8, name is 2-Bromo-4-(trifluoromethoxy)aniline, molecular formula is C7H5BrF3NO, 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.
A mixture of 2-bromo-4-(trifluoromethoxy)aniline 17 (Maybridge, 2.048 g, 8.00 mmol), methyl acrylate (1.80 mL, 20.0 mmol), Pd(OAc)2 (215.5 mg, 0.960 mmol), tri-o-tolylphosphine (1.169 g, 3.84 mmol), and dry Et3N (4.30 mL, 30.9 mmol) in dry CH3CN (16.0 mL) was stirred under reflux conditions under N2 for 4 h, then concentrated in vacuo. The residue was partitioned between H2O (30 mL) and AcOEt (30 mL). The organic layer was separated and the aqueous layer was extracted with AcOEt (30 mL × 2). The organic layers were combined, dried over anhydrous MgSO4, filtered, and concentrated in vacuo to afford 3.630 g of the title product 21 (crude). This compound was used for the next step without further purification. 1H NMR (270 MHz, CDCl3) delta 7.74 (1H, d, J = 15.8 Hz), 7.23-7.02 (2H, m), 6.68 (1H, d, J = 8.72 Hz), 6.36 (1H, d, J = 15.8 Hz), 4.00 (2H, br s), 3.81 (3H, s).
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-(trifluoromethoxy)aniline, its application will become more common.
Reference:
Article; Hayashi, Shigeo; Ueno, Naomi; Murase, Akio; Nakagawa, Yoko; Takada, Junji; European Journal of Medicinal Chemistry; vol. 50; (2012); p. 179 – 195;,
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