Application of 1904-31-0, The chemical industry reduces the impact on the environment during synthesis 1904-31-0, name is 1-Methyl-1H-pyrazol-3-amine, I believe this compound will play a more active role in future production and life.
The compound N-methyl-3-aminopyrazole (2000 g, 20.6 mol, 1.0 eq) was dissolved in 6000 ml of concentrated hydrochloric acidAnd 2000 ml of water,Cooled to 0-5 C in an ice-salt bath,Then, 3.5 L of a saturated aqueous sodium nitrite solution (NaNO2, 2842.8 g, 41.2 mol, 2.0 eq) was added dropwise,After mechanical stirring reaction for 20 min,The reaction solution was added dropwise to an aqueous solution of 8000 ml of potassium iodide (8549.0 g, 51.5 mol, 2.5 eq) at 0 C,After completion of the dropwise addition,The reaction was allowed to spontaneously rise to room temperature for 4 h,After TLC detection reaction was complete,Add ethyl acetate extraction 2 times,The organic phase was dried with saturated brine and concentrated,The crude product was purified via flash column to give compound 3-iodo-l-methyl-lH-pyrazole (3473.8 g, 16.7 mol)Yield 81.0%.
In the field of chemistry, the synthetic routes of compounds are constantly being developed and updated. I will also mention this compound in other articles, 1-Methyl-1H-pyrazol-3-amine, other downstream synthetic routes, hurry up and to see.