In the next few decades, the world population will flourish. As the population grows rapidly and people all over the world use more and more resources, all industries must consider their environmental impact. 871239-17-7, name is 3-Bromo-1-(2-chlorophenyl)-1H-pyrazole-5-carboxylic acid belongs to pyrazoles-derivatives compound, it is a common compound, a new synthetic route is introduced below. Computed Properties of C10H6BrClN2O2
EXAMPLE 3; Preparation of 3-bromo-1- (2-chlorophenyl)-N-[2,4-dichloro carbonyl]phenyl]-1H-pyrazol-5-carboxamide; Step A: Preparation of 2-[3-bromo-1-(2-chlorophenyl)-1H-pyrazol-5-yl]-6,8-dichloro- 4H-3, 1 -benzoxazin-4-one; To a mixture of 3-bromo-1-(2-chlorophenyl)-lH-pyrazole-5-carboxylic acid (i. e. the carboxylic acid product of Example 1, Step E) (3.0 g, 9.44 mmol) and 3,5-dichloroanthranilic acid (1.94 g, 9.44 mmol) in acetonitrile (60 mL) was added 3-picoline (4.81 mL, 49.1 mmol) at room temperature, and the reaction mixture was stirred for 5 minutes. The reaction mixture was cooled to -10 C and methanesulfonyl chloride (1.91 mL, 24.56 mmol) in acetonitrile (5 mL) was added dropwise. The reaction mixture was warmed to room temperature and stirred overnight. The resulting solids were isolated by filtration, washed with water, then dissolved in excess methylene chloride and dried (MgS04). The solvent was evaporated under reduced pressure, and the residual solid was purified by chromatography on silica gel to afford the title compound (2.0 g). 1H NMR (CDC13) No. 8.0 (s, 1H), 7.72 (s, 1H), 7.4-7.55 (m, 4H), 7.28 (s, 1H)
The synthetic route of 871239-17-7 has been constantly updated, and we look forward to future research findings.