Sources of common compounds: 1-Methyl-1H-pyrazol-5-amine

If you are interested in these compounds, you can also browse my other articles.Thank you for taking the time to read this article. I hope you enjoyed it.

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, Safety of 1-Methyl-1H-pyrazol-5-amine

Degas a mixture of 2-(2-chloropyrimidin-4-yl)-6,6-dimethyl-5-(2- morpholinoethyl)thieno[2,3-c]pyrrol-4-one (20.8 g, 52.9 mmol), 2-methylpyrazol-3-amine (5.7 g, 58.2 mmol), cesium carbonate (37.9 g, 116.5 mmol), 4,5- bis(diphenylphosphino)-9,9-dimethylxanthene (2.6 g, 4.5 mmol) and 1,4-dioxane (529 mL) with nitrogen for 10 minutes. Add tris(dibenzylideneacetone)dipalladium(0) (2.4 g, 2.6 mmol) and heat the mixture to 85 C for four hours. Cool the mixture to room temperature and filter the mixture through filter paper. Concentrate the filtrate under reduced pressure. Repeat the reaction starting with 8 g of 2-(2-chloropyrimidin-4-yl)-6,6- dimethyl-5-(2-morpholinoethyl)thieno[2,3-c]pyrrol-4-one and combine the two residues. Purify the residue by silica gel column chromatography (330 g) eluting with a gradient from 5-25% MeOH in (10% EtOAc in DCM). Pool the fractions and concentrate under reduced pressure. Re-purify the residue by silica gel column chromatography (330 g) eluting with a gradient from 5-25% MeOH in 10% EtOAc in DCM. Pool the fractions and concentrate under reduced pressure. Dissolve the residue in DCM (400 mL) and then add acetone (1 L). Slowly concentrate the mixture under reduced pressure to approximately 700 mL. Collect the solid by vacuum filtration to give the title compound 14.8 g (48%). MS (m/z): 454 (M+1).

If you are interested in these compounds, you can also browse my other articles.Thank you for taking the time to read this article. I hope you enjoyed it.