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, Application In Synthesis of 4-Nitro-1H-pyrazole
4-Nitro-1H-pyrazole (1.13 g, 9.99 mmol) was dissolved in 15 mL of dry THF.The reaction flask was placed in an ice bath and cooled, and NaH (600 mg, 25 mmol) was slowly added.Stir to room temperature and stir for 2.5 h, then slowly add methyl iodide (3.84 g, 20 mmol).Stirring was continued for 1.5 h, and the reaction was quenched by slowly adding 15 mL of saturated brine.The reaction solution was concentrated under reduced pressure and ethyl acetate (50 mL×3)Wash with water, saturated brine (50 mL×2), dry over anhydrous sodium sulfate,1-Methyl-4-nitro-1H-pyrazole (826 mg, 65%) was obtained as a pale yellow solid.
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Reference:
Patent; Chengdu Diao Pharmaceutical Group Co., Ltd.; Guo Na; He Qian; Deng Ta; Dai Chuan; Yang Qiao; Chen Shuang; Fan Bo; (131 pag.)CN108373476; (2018); A;,
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics