16034-46-1, In the next few decades, the world population will flourish. As the population grows rapidly and people all over the world use more and more resources, all industries must consider their environmental impact. 16034-46-1, name is 1-Methyl-1H-pyrazole-5-carboxylic acid belongs to pyrazoles-derivatives compound, it is a common compound, a new synthetic route is introduced below.
A mixture of 1-methyl-1 H-pyrazole-5-carboxylic acid (1.0 g, 7.93 mmol), BH3. DMS (39.6 mL, 79 mmol) in THF (40 mL) was stirred at reflux overnight. The mixture was diluted with MeOH (30 mL) and stirred for 30 min, and the mixture was concentrated in vacuo. The residue was purified by silica gel column chromatography, eluting with CH2Cl2/MeOH. The residue was dissolved in DCM (20 mL) and to the solution was added SOCl2(5 mL, 68.5 mmol) at room temperature. The mixture was stirred for 3 h then concentrated to afford the product as an oil which was used in the next step without further purification. MS (ESI) calc? d for (C5H7ClN2) [M+H]+, 131.0, found, 131.0
The synthetic route of 1-Methyl-1H-pyrazole-5-carboxylic acid has been constantly updated, and we look forward to future research findings.