Synthetic Route of 141573-95-7, 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. 141573-95-7, name is Ethyl 3-(difluoromethyl)-1-methyl-1H-pyrazole-4-carboxylate belongs to pyrazoles-derivatives compound, it is a common compound, a new synthetic route is introduced below.
10 g [44.27 mmol, 98.9% GC purity] of 3′,4′,5′-trifluorobiphenyl-2-amine and 9.04 g [44.27 mmol, 99% GC purity] of ethyl 3-(difluoromethyl)-1-methyl-1H-pyrazole-4-carboxylate were dissolved in 35 g of toluene and 7.5 g of NMP. This solution was admixed, under agitation, with 8.37 g of sodium methoxide (30% by weight in methanol) added at 70 C. and 500 mbar in the course of 20 minutes. Methanol and ethanol were removed from the reaction mixture as azeotrope with toluene. On completion of the addition of sodium methoxide the reaction mixture was subsequently stirred at 500 mbar and 70 C. for 15 minutes. The vacuum was then reduced to 300 mbar for 2 hours and to 200 mbar for a further hour. The reaction was tracked via GC-MS analysis to obtain 3-(difluoromethyl)-1-methyl-N-(3′,4′,5′-trifluorobiphenyl-2-yl)-1H-pyrazole-4-carboxamide having a GC-MS purity of 39%.
The synthetic route of Ethyl 3-(difluoromethyl)-1-methyl-1H-pyrazole-4-carboxylate has been constantly updated, and we look forward to future research findings.
Reference:
Patent; Moradi, Wahed Ahmed; Lui, Norbert; Dockner, Michael; US2014/128617; (2014); A1;,
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics