Adding a certain compound to certain chemical reactions, such as: 1192-21-8, name is 1-Methyl-1H-pyrazol-5-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 1192-21-8, 1192-21-8
Example 194; N-(1-Methyl-1H-pyrazol-5-yl)-4-(3-phenyl-1,2,4-thiadiazol-5-yl)piperazine-1-carboxamide; (1) 2,2,2-Trichloroethyl (1-methyl-1H-pyrazol-5-yl)carbamate; To a solution of 1-methyl-1H-pyrazole-5-amine (1.00 g, 10.3 mmol) and pyridine (1.01 ml, 12.4 mmol) in tetrahydrofuran (34 ml) was added 2,2,2-trichloroethyl chloroformate (1.71 ml, 12.4 mmol) with ice-cooling and the mixture was stirred at room temperature for 1 hour. Water was added to the reaction mixture and the mixture was extracted with ethyl acetate. The extract was washed with water and dried over anhydrous magnesium sulfate and the solvent was distilled off under reduced pressure. The residue was purified by silica gel column chromatography (hexane : ethyl acetate = 1 : 1) to obtain the desired product (1.43 g, 50.8percent) as an oil. 1H-NMR (CDCl3) delta; 3.78 (3H, s), 4.83 (2H, s), 6.21 (1H, br s), 7.15 (1H, br s), 7.43 – 7.44 (1H, m).
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