Electric Literature of 3469-69-0,Some common heterocyclic compound, 3469-69-0, name is 4-Iodopyrazole, molecular formula is C3H3IN2, 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.
4-Iodopyrazole (2 g, 10.311 mmol) was dissolved in DMF (50 mL), sodium hydride (1.25 g, 30.933 mmol) was added at 0 C, and the reaction was stirred for 30 min.Methyl iodide (1.3 mL, 20.622 mmol) was slowly added dropwise to the above solution, warmed to room temperature, and stirred for 22 hours.After the reaction was completed, filter, concentrate the filtrate, dilute with water, extract with ethyl acetate (80 mL ¡Á 3), collect the organic phase, dry over anhydrous sodium sulfate, filter, and concentrate the filtrate.Silica gel column chromatography was separated and purified (PE / EtOAc (v / v) = 18/1) to obtain 1.37 g of light yellow liquid, yield: 63.9%.
The synthetic route of 3469-69-0 has been constantly updated, and we look forward to future research findings.