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| | 1-Methyl-1H-pyrazole-3-carboxylic acid Basic information |
| | 1-Methyl-1H-pyrazole-3-carboxylic acid Chemical Properties |
| Melting point | 150-152 ºC | | Boiling point | 306.9±15.0 °C(Predicted) | | density | 1.34±0.1 g/cm3(Predicted) | | storage temp. | Keep in dark place,Sealed in dry,Room Temperature | | form | powder to crystal | | pka | 4.05±0.10(Predicted) | | color | White to Orange to Green | | InChI | InChI=1S/C5H6N2O2/c1-7-3-2-4(6-7)5(8)9/h2-3H,1H3,(H,8,9) | | InChIKey | YBFIKNNFQIBIQZ-UHFFFAOYSA-N | | SMILES | N1(C)C=CC(C(O)=O)=N1 | | CAS DataBase Reference | 25016-20-0(CAS DataBase Reference) |
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ALFA
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| | 1-Methyl-1H-pyrazole-3-carboxylic acid Usage And Synthesis |
| Uses | 1-Methyl-1H-pyrazole-3-carboxylic acid is a biochemical reagent that can be used as a biological material or organic compound for life science related research. | | Definition | ChEBI: 1-methyl-pyrazole-3-carboxylic acid is a member of the class of pyrazoles that is N-methylpyrazole substituted by a carboxy group at position 3. It has a role as a metabolite. It is a member of pyrazoles and a monocarboxylic acid. It is functionally related to a N-methylpyrazole. | | Synthesis | Over 45 minutes, dimethyl sulfate (236 g, 177 mL, 1.87 mol) was slowly added dropwise to a stirred solution of pyrazole-3-carboxylic acid (200 g, 1.78 mol) dissolved in 20% aqueous sodium hydroxide (850 mL) at 40 °C. The reaction mixture was heated at 80 °C for 2 h and subsequently cooled to room temperature. The reaction mixture was filtered and the filtrate was acidified to pH 1 with concentrated hydrochloric acid, the precipitate was collected by filtration, washed with water and dried under vacuum to afford 1-methyl-1H-pyrazole-5-carboxylic acid (85 g, 38% yield). The remaining filtrate was concentrated to 800 mL in vacuum and extracted with chloroform (15 x 400 mL) several times. The organic phases were combined, dried with anhydrous magnesium sulfate and concentrated in vacuum to remove the solvent. The residue was recrystallized by isopropanol to give 1-methyl-1H-pyrazole-3-carboxylic acid (74 g) as a white crystalline solid. | | References | [1] J. Gen. Chem. USSR (Engl. Transl.), 1982, vol. 52, # 11, p. 2291 - 2296
[2] Zhurnal Obshchei Khimii, 1982, vol. 52, # 11, p. 2592 - 2598
[3] Patent: WO2004/58702, 2004, A2. Location in patent: Page 30-31; 24 |
| | 1-Methyl-1H-pyrazole-3-carboxylic acid Preparation Products And Raw materials |
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