5334-39-4, name is 3-Methyl-4-nitro-1H-pyrazole, belongs to pyrazoles-derivatives compound, is considered to be a conventional heterocyclic compound, which is widely used in drug synthesis. The chemical synthesis route is as follows. Safety of 3-Methyl-4-nitro-1H-pyrazole
A mixture of 3-methyl-4-nitro-lH-pyrazole (2.1 g, 17 mmol) and 4- methylsulfonylphenylboronic acid (5.0 g, 25 mmol), copper (II) acetate monohydrate (0.91 g, 5.0 mmol) and pyridine (0.5 g, 6.6 mmol) in DMF was stirred at 95 C under an oxygen atmosphere for 7 hours. The reaction was diluted with water, extracted with EtOAc (3x). The combined extracts were washed with brine, dried over sodium sulfate, filtered and concentrated. The crude product was purified by flash chromatography to give a mixture of 3 -methyl- 1 -(4- (methylsulfonyl)phenyl)-4-nitro-lH-pyrazole compound and 5 -methyl- 1 -(4-(methylsulfonyl)phenyl)-4-nitro-lH-pyrazole (1.3 g, 28%).
The synthetic route of 5334-39-4 has been constantly updated, and we look forward to future research findings.