Reference of 181585-93-3, The chemical industry reduces the impact on the environment during synthesis 181585-93-3, name is Methyl 5-nitro-1H-pyrazole-3-carboxylate, I believe this compound will play a more active role in future production and life.
5-Nitro-3-pyrazole-carboxylic acid methyl ester (22.35 g, 130.61 mmol) is dissolved in each 160 mL THF und glacial acetic acid. Then, Pd-C (10%, 4.36 g) are added and the reaction is stirred for 6 days under hydrogen atmosphere at RT. Then, the mixture is filtered over celite and the solvent is removed under vacuum. The crude material is dissolved in methylene chloride (800 mL) and sodium hydrogen carbonate (200 g) are added, filtered and the solvent is again removed under vacuum. This procedure is repeated until the acetic acid smell is lost. 5-Amino-3-pyrazole-carboxylic acid methyl ester is isolated in high yields (16.91 g, 91.7%).
In the field of chemistry, the synthetic routes of compounds are constantly being developed and updated. I will also mention this compound in other articles, Methyl 5-nitro-1H-pyrazole-3-carboxylate, other downstream synthetic routes, hurry up and to see.
Reference:
Patent; MERZ PHARMA GMBH & CO. KGAA; US2008/32998; (2008); A1;,
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics