Application of 41825-73-4,Some common heterocyclic compound, 41825-73-4, name is 2-Bromo-4,6-dimethylaniline, molecular formula is C8H10BrN, 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.
Under an argon atmosphere, to a solution of 13.9 g (69.5 mmol) of2-bromo-4,6-dimethylaniline in 200 ml of THF, 27.9 ml of 2.5 M (69.5 mmol) “BuLi in hexanes were added at -5O0C. This mixture was stirred for 2 hours at ambient temperature. The resulting solution was added dropwise over ca. 1 hour, while vigorously stirring, to a solution of 15.0 g (69.5 mmol) of chloro(dimethyl)(2,3,4,5-tetramethyl-2,4-cyclopentadien-l-yl)silane in 100 ml of THF at O0C. The resulting mixture was stirred overnight at ambient temperature, then, evaporated to dryness. To the residue 100 ml of toluene were added. This mixture was filtered through a glass frit (G4). The filtrate was evaporated to dryness. Fractional distillation gave a yellow liquid, bp 180-184C/0.5 mm Hg. Yield 20. I g (77%).Anal. calc. for C19H28BrNSi: C, 60.03; H, 7.46. Found: C, 60.25; H, 7.40.1H NMR (CDCl3): delta 7.15 (s, IH3 3-H in phenyl), 6.82 (s, IH, 5-H in phenyl), 3.10 (br.s, IH, 1-H in Cp), 2.95 (br.s, IH, NH), 2.22 (s, 3H, 4-Me in phenyl), 2.19 (s, 3H, 6-Me in phenyl), 2.01 (s, 6H, 2,5-Me in Cp), 1.83 (s, 6H, 3,4-Me in Cp), 0.15 (s, 6H, SiMe2).13C NMR (CDCl3): delta 140.8, 136.5, 132.7, 131.1, 130.8, 130.7, 130.3, 118.4, 56.3, 20.5, 20.1, 14.5, 11.3, -0.6.
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-4,6-dimethylaniline, its application will become more common.
Reference:
Patent; EXXONMOBIL CHEMICAL PATENTS, INC.; WO2007/70040; (2007); A1;,
Bromide – Wikipedia,
bromide – Wiktionary