Application of 1904-31-0, 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. 1904-31-0, name is 1-Methyl-1H-pyrazol-3-amine belongs to pyrazoles-derivatives compound, it is a common compound, a new synthetic route is introduced below.
2-Bromo-5-cyclopentyloxy-pyridine (0.97 mmol), sodium-tert.- butylate (1.4 eq.), and 1-methyl-1 H-pyrazole-3-amine (1.2 eq.) are dissolved in degassed dioxane (2 ml) and heated to 80 0C. Chloro-(di-2- norbornylphosphino)(2-dimethylaminoferrocene-1-yl)palladium (II) (3 mg) in degassed dioxane (1 ml) is added and the reaction mixture is heated for 1 hour at 150 0C in the microwave. The reaction is quenched with ethylacetate / methanol (30 ml, 9:1 ) and filtrated over celite. The solvent of the filtrate is removed in vacuo. (5-Cyclopentyloxy-pyridine-2-yl)-(1-methyl- 1 H-pyrazole-3-yl)-amine (“A25”) is obtained after reversed phase column chromatography (water / acetonitrile + 0.1 percent TFA) as a colorless powder in a yield of 29 percent; HPLC (method C): 1.55 min; LC-MS (method A): 0.97 min, 259.15 (M+H+);
The synthetic route of 1-Methyl-1H-pyrazol-3-amine has been constantly updated, and we look forward to future research findings.