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Adding a certain compound to certain chemical reactions, such as: 1904-31-0, name is 1-Methyl-1H-pyrazol-3-amine, 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 1904-31-0, category: pyrazoles-derivatives
2-Bromo-5-(4-methanesulfonyl-phenoxy)-pyridine (0.47 mmol), sodium-tert.-butylate (1.4 eq.), and 1 -methyl-1 H-pyrazole-3-amine (1.2 eq.) are dissolved in degassed dioxane (2.5 ml) and heated to 80 0C. Chloro-5 (di-2-norbornylphosphino)(2-dimethylaminoferrocene-1 -yl)palladium (II) (5.9 mg) in degassed dioxane (1 ml) is added and the reaction mixture is heated for 1 hour at 142 0C in the microwave. The reaction is quenched with ethylacetate (30 ml) and filtrated over celite. The solvent of the filtrate is removed in vacuo. [5-(4-Methanesulfonyl-phenoxy)-pyridine-2-yl]-(1- methyl-1 H-pyrazole-3-yl)-amine (“A27”) is obtained after reversed phase column chromatography (water / acetonitrile + 0.1 percent TFA) as orange powder in a yield of 55 percent; HPLC (method C): 1.57 min; LC-MS (method A): 0.787 min, 345.15 (M+H+);1H-NMR (DMSO-d6l 500 MHz): delta [ppm] 9.317 (s, 1H), 8.020 (d, 1 H, J=2.9 Hz), 7.883 {d, 2H, J=8.9 Hz), 7.504 (d, 1 H, J=2.2 Hz), 7.470 (dd, 1 H, J=2.9 Hz, J=9.0 Hz), 7.355 (d, 1 H, J=9.0 Hz), 7.125 (d, 2H, J=8.9 Hz), 6.268 (d, 1 H, J=2.2 Hz), 3.740 (s, 3H), 3.170 (s, 3H).Example 23
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