Synthetic Route of 25016-20-0, Each compound has different characteristics, and only by selecting the characteristics of the compound suitable for a specific situation can the compound be applied on a large scale. 25016-20-0, name is 1-Methyl-1H-pyrazole-3-carboxylic acid, This compound has unique chemical properties. The synthetic route is as follows.
Example 67;(i?)-(l-Methyl-l/-r-pyrazoI-3-yl)(l-(4-(trifluoromethyl)phenyl)-3,4-dihydroiso- quinoIin-2(lH)-yl)methanone; A solution of (R)- -(4-(trifluoromethyl)phenyl)- 1,2,3, 4-tetrahydroisoquinoline (58 mg, 0.21 mmol, example 30, step 1) in DMF (1 mL) was added 1-methyl-leta- pyrazole-3-carboxylic acid (Fluorochem, 34 mg, 0.27 mmol), 1-hydroxybenzo- triazole hydrate (42 mg, 0.27 mmol), and JV-((isopropylimino)methylene)propan- 2-amine (66 muL, 0.42 mmol). The resulting mixture was then stirred at RT for 16 h. Then, the mixture was filtered and the filtrate was purified by preparative HPLC to give the target compound. The product was dissolved in MeOH and passed through PL-HCO3 MP resin and the resin was washed with MeOH (2 x 0.3 mL). The combined filtrates were concentrated and dried under vacuum to give the title compound as a light-yellow solid. MS (ESI, positive ion) m/z: 386 (M+H).
The chemical industry reduces the impact on the environment during synthesis 1-Methyl-1H-pyrazole-3-carboxylic acid. I believe this compound will play a more active role in future production and life.
Reference:
Patent; AMGEN INC.; WO2009/73203; (2009); A1;,
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics