Analyzing the synthesis route of 2-Bromo-4-methoxy-1-(trifluoromethoxy)benzene

Synthetic Route of 1049730-91-7,Some common heterocyclic compound, 1049730-91-7, name is 2-Bromo-4-methoxy-1-(trifluoromethoxy)benzene, molecular formula is C8H6BrF3O2, 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.

To a stirred solution of 2-Bromo-4-methoxy-1-trifluoromethoxy-benzene (Preparation 59, 19.0 g, 73.9 mmol) in anhydrous tetrahydrofuran (400 ml) was added n-butyl lithium (2.5M solution in hexanes, 44.2 ml, 110.9 mmol) while maintaining the temperature below -7O0C under an atmosphere of nitrogen. The resulting solution was stirred at -7O0C for 1 hour. Tri-/sopropyl borate (20.9 g, 110.9 mmol) was added and the mixture stirred at -7O0C for an additional 2 hours. The reaction mixture was quenched with saturated ammonium chloride aqueous solution (400 ml). The resulting mixture was acidified to pH~5 by addition of hydrochloric acid (1 N aqueous solution). The layers were separated and the organic layer was washed with water (200 ml) then dried over anhydrous MgSO4 (s), filtered and evaporated in vacuo. Residue was purified by recrystallization from ethyl acetate: petroleum ether (2 ml:50 ml) to afford the title compound as a white solid (7.5 g, 43%).1HNMR (c^DMSO): 3.76 (s, 3H), 6.99 (dd, 1 H), 7.06 (d, 1 H), 7.18 (dd, 1 H), 8.36 (s, 2H).

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-methoxy-1-(trifluoromethoxy)benzene, its application will become more common.