Adding a certain compound to certain chemical reactions, such as: 2075-46-9, name is 4-Nitro-1H-pyrazole, belongs to pyrazoles-derivatives compound, can increase the reaction rate and produce products with better performance than those obtained under traditional synthetic methods. Here is a downstream synthesis route of the compound 2075-46-9, Formula: C3H3N3O2
At 0 C., to a solution of 4-nitropyrazole (3.3 g, 29.2 mmol) in anhydrous THF (30 mL) was added sodium hydride (1.3 g, 32.1 mmol). After the mixture was stirred for 1 hour, iodomethane (2 mL) was added slowly, and the resultant mixture was stirred for further 2 hours. Then the mixture was poured into ice water (100 mL), extracted with ethyl acetate (50 mL×3), and the organic layer was dried over anhydrous sodium sulfate. The mixture was filtrated, the filtrate was concentrated under reduced pressure. The residue was added into a component solvent (20 mL) of petroleum ether and ethyl acetate (20:1), stirred, and there was solid precipitated. After filtration, the solid was dried in vacuum for 8 hours to give white solid 15-b (2.6 g, yield: 70%), which was used directly for the next step without further purification. LC-MS (ESI): m/z=128 [M+H]+.
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Reference:
Patent; SHANGHAI CHEMEXPLORER CO., LTD.; XU, Zusheng; ZHANG, Nong; SUN, Qingrui; WANG, Tinghan; US2015/336982; (2015); A1;,
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics