29681-43-4
Methyl 4-methoxypyridine-2-carboxylate
CAS: 29681-43-4
Molecular Formula: C8H9NO3
29681-43-4 - Names and Identifiers
29681-43-4 - Physico-chemical Properties
| Molecular Formula | C8H9NO3 |
| Molar Mass | 167.16 |
| Density | 1.156±0.06 g/cm3(Predicted) |
| Melting Point | 47-50 |
| Boling Point | 280.4±20.0 °C(Predicted) |
| Flash Point | 123.4°C |
| Solubility | DMSO (Slightly), Methanol (Very Slightly) |
| Vapor Presure | 0.0038mmHg at 25°C |
| Appearance | Solid |
| Color | Pale Yellow |
| pKa | 2.44±0.10(Predicted) |
| Storage Condition | Inert atmosphere,Room Temperature |
| Refractive Index | 1.503 |
| MDL | MFCD00956223 |
29681-43-4 - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| WGK Germany | 3 |
| Hazard Class | IRRITANT |
29681-43-4 - Reference Information
| application | methyl 4-methoxypicolinic acid is an organic intermediate that can be made of 2-picolinic acid As a raw material, 4-chloro-2-picolinic acid is first chlorinated, and then reacted with methanol to prepare methyl 4-methoxypicolinic acid. |
| Preparation | 2-picolinic acid (9.92g,80.7mmol) and sodium bromide (0.90g,8.7mmol) were added to thionyl chloride (70mL), and the mixture was heated and refluxed for 16 hours. The reaction was vacuum concentrated and cooled to 0°C. MeOH(30mL) was carefully added and the reaction was heated and refluxed for 36 h. Vacuum removed the solvent, dissolved the residue in CH2Cl2(100mL), added sodium carbonate (12.8g,121mmol), and stirred the mixture for 3 hours. H2O(100mL) was added and the reaction was extracted with CH2Cl2(5 × 50mL). The combined organic extracts were dried (MgSO4) and concentrated in vacuum. The crude residue was purified by rapid column chromatography (SiO2, eluted with Et2O, then eluted with a 5:95 MeOH-CH2Cl2) and recrystallized (hexane) to give the white acicular product methyl 4-methoxypicolinate (9.03g,67%). |
Last Update：2024-04-09 20:52:54
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View History
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