Synthetic Route of 35852-81-4, In the next few decades, the world population will flourish. As the population grows rapidly and people all over the world use more and more resources, all industries must consider their environmental impact. 35852-81-4, name is 4-Chloro-1-methyl-1H-pyrazole belongs to pyrazoles-derivatives compound, it is a common compound, a new synthetic route is introduced below.
General procedure: Azole (1.0 mmol, 1.0 eq.) (if solid), aryl bromide (1.05 mmol, 1.05 eq.) (if solid), (palladium(II) acetate (11 mg, 0.05 mmol, 0.05 eq.), QPhos (53 mg, 0.075 mmol, 0.075 eq.) and tetrabutylammonium acetate (904 mg, 3.0 mmol, 3.0 eq.) were added to a reaction vial (ambient atmosphere). The vial was equipped with a stirring bar and placed under a nitrogen atmosphere. Dioxane (2.50 ml, 0.4M) was added or if liquid, azole/aryl bromide was added as a solution in dioxane (2.50 ml, 0.4M). The mixture was stirred at 80-105 C under nitrogen or microwaved at 120 C for 16-72 h (complete consumption of one of the starting materials or no further progress as monitored by UPLC/MS). The crude reaction mixture was purified by column chromatography. The 1H NMR spectra of the obtained products matched the data reported in the literature.
The synthetic route of 4-Chloro-1-methyl-1H-pyrazole has been constantly updated, and we look forward to future research findings.
Reference:
Article; Vernier, William F.; Gomez, Laurent; Tetrahedron Letters; vol. 58; 49; (2017); p. 4587 – 4590;,
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics