Synthetic Route of 287922-71-8, 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. 287922-71-8, name is 4-Bromo-1-methyl-1H-pyrazole-3-carbonitrile, This compound has unique chemical properties. The synthetic route is as follows.
To a solution of tert-butyl 5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)indoline-l-carboxylate (1,8 g, 5.32 mmol) in dioxane (20 mL) and H20 (4 mE) was added K2C03 (2 g,14.52 mmol), [1,1 -bis(diphenylphosphino)ferrocene]dichEoropal1adium(I1) (350 mg, 0.5 mmol) and 4-bromo-1-methyl-IH-pyrazole-3-carbonitrile (0.9 g, 4.84 mmol). The mixture was heated to 120 C for 12 h under a nitrogen atmosphere. After cooling the reaction to room temperature, the mixture was concentrated in vacuo. The crude residue was purified bysilica gel chromatography (petroleum ether / EtOAc 1: 1) to give the title compound (1.13 g, 70%) as yellow solid. LCMS M/Z (M+H-t-Bu) 269.
The chemical industry reduces the impact on the environment during synthesis 4-Bromo-1-methyl-1H-pyrazole-3-carbonitrile. I believe this compound will play a more active role in future production and life.