Introduction of a new synthetic route about 3-Methyl-4-nitro-1H-pyrazole

At the same time, in my other blogs, there are other synthetic methods of this type of compound, 3-Methyl-4-nitro-1H-pyrazole, and friends who are interested can also refer to it.

5334-39-4, As we all know, there are many different methods for the synthesis of a compound, and people can choose the synthesis method that suits their own laboratory according to the actual situation. 5334-39-4 name is 3-Methyl-4-nitro-1H-pyrazole, This compound is widely used in many fields, so it is necessary to find a new synthetic route. The downstream synthesis method of this compound is introduced below.

5.00 g (39.4 mmol) 3-methyl-4-nitro-1 H-pyrazole was dissolved in 115 mL acetonitrile and 9.26 g (47.2 mmol) 4-(bromomethyl)-benzonitrile and 15.4 g (47.2 mmol) cesium carbonate were added. The suspension was stirred at 60 C for 3 h. Afterwards the reaction mixture was filtered, and the filter cake was washed with ethyl acetate. The filtrate was evaporated to dryness and the residue was purified via a Biotage chromatography system (100g snap KP-Sil column, hexane / 40 – 100% ethyl acetate) to give 7.27 g (76%) of the desired title compounds as a mixture. 1H-NMR (400 MHz, DMSO d6) delta (ppm) = 2.39 / 2.59 (s, 3H), 5.42 / 5.55 (s, 2H), 7.35 / 7.47 (d, 2H), 7.80 – 7.85 (m, 2H), 8.29 / 8.99 (s, 1 H).

At the same time, in my other blogs, there are other synthetic methods of this type of compound, 3-Methyl-4-nitro-1H-pyrazole, and friends who are interested can also refer to it.