Application of 497832-99-2,Some common heterocyclic compound, 497832-99-2, name is 4-Bromo-1-methyl-3-(trifluoromethyl)-1H-pyrazole, molecular formula is C5H4BrF3N2, 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 stuffed mixture of XXXX-1 (400 mg, 2.4 mmol), XXXX-2 (500 mg, 2.18 mmol), and K3P04 (2 M, 1.1 mL, 2.2 mmol) in dioxane (20 mL) was added Pd(dppf)C12 (160 mg, 0.2 18 mmol) under N2 protection. The reaction mixture was degassed with nitrogen again and stirred at 90C overnight. The mixture was concentrated, diluted with H20 (20 mL), extracted with EtOAc (30 mLx3). The combined organic layer was washed with brine, dried over anhydrous Na2SO4, and concentrated in vacuo. The residue was purified by column chromatography (PE/EA=2/ 1) to give XXXX-3 (400 mg, 67% yield).
The synthetic route of 497832-99-2 has been constantly updated, and we look forward to future research findings.