Each compound has different characteristics, and only by selecting the characteristics of the compound suitable for a specific situation can the compound be applied on a large scale. 70951-85-8, name is 4-Bromo-1-(tert-butyl)-1H-pyrazole, This compound has unique chemical properties. The synthetic route is as follows., category: pyrazoles-derivatives
Isopropyl magnesium chloride lithium chloride complex (1.3 M in THF, 28.4 mL, 37 mmol) was charged to a solution of 4-bromo-1-(tert-butyl)-1H-pyrazole (5.0 g, 25 mmol) in anhydrous THF (25 mL) under argon at ambient temperature. Anhydrous dioxane (3.3 g, 37 mmol) was charged to the reaction, and the reaction was agitated at 45 00 for 4 h. The resulting mixture was cooled to ambient temperature and charged to an anhydrous solution of acetic anhydride (7.5 g, 73 mmol) in THF (25 mL) at -20 00 The resulting mixture was warmed to ambient temperature and concentrated to a residue. The mixture was dissolved in methyl t-butyl ether (50 mL) and washed with water (25 mL). The organic portion was concentrated to provide crude 1-(1-(tert-butyl)-1H-pyrazol-4-yl)ethan-1-one as an oil (7.6 g, 36 wt%) and 67% yield. Crystallization in a mixture of methyl t-butyl ether and heptane provided analytically pure material 1 -(1 -(tert-Butyl)-1 H-pyrazol-4-yl)ethan-1 -one. NMR (500 MHz, ODd3) = 7.96 (s, 1 H), 7.86 (s, 1 H), 2.37 (s, 3H), 1.55 (s, 9H).
According to the analysis of related databases, 70951-85-8, the application of this compound in the production field has become more and more popular.