Application of 37622-90-5, 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. 37622-90-5, name is Ethyl 4-pyrazolecarboxylate belongs to pyrazoles-derivatives compound, it is a common compound, a new synthetic route is introduced below.
To a stirred solution of ethyl-1H pyrazole carboxylate (5.0 g, 3.7mmol) in DMF (50 mL), Cs2CO3 (23 g, 71.35mmol) and tert-butyl 4-((methylsulfonyl)-oxy) piperidine-1-carboxylate (9.9 g, 35.6 mmol) were added at 5 C and reaction mixture was stirred at 90 C overnight. The completion of the reaction was confirmed by TLC. The reaction mixture was poured into ice cold water. The resulting solid was filtered, washed with water (50 mL) and dried under reduced pressure. It was used in the next step without any further purification. Yield: 87% (10 g, off white solid). 1H NMR (400 MHz, DMSO-d6 : delta 8.39 (s, 1 H), 7.87 (s, 1 H), 4.45-4.39 (m, 1 H), 4.21 (q, J = 7.2 Hz, 2H), 4.05-4.02 (m, 2H), 2.01 -1.98 (m, 2H), 1.85-1.78 (m, 2H), 1.42 (s, 9H), 1.26 (t, J = 7.2 Hz, 3H). LCMS: (Method A) 222.0 (M-Boc), Rt. 2.77 min, 92.86% (Max).
The synthetic route of Ethyl 4-pyrazolecarboxylate has been constantly updated, and we look forward to future research findings.