Molecular Formula | C7H6BrNO2 |
Molar Mass | 216.03 |
Density | 1.579±0.06 g/cm3(Predicted) |
Melting Point | 101-103°C |
Boling Point | 290.9±20.0 °C(Predicted) |
Flash Point | 129.7°C |
Water Solubility | Soluble in water. |
Vapor Presure | 0.00202mmHg at 25°C |
Appearance | Brown crystal |
pKa | -0.67±0.10(Predicted) |
Storage Condition | Inert atmosphere,Room Temperature |
Refractive Index | 1.553 |
MDL | MFCD04112493 |
Hazard Symbols | Xi - Irritant |
Risk Codes | R36/37/38 - Irritating to eyes, respiratory system and skin. R36 - Irritating to the eyes |
Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S37 - Wear suitable gloves. |
HS Code | 29333990 |
Uses | Pyridine and its derivatives are important intermediates for the synthesis of heterocyclic compounds, pesticides and medicines. New compounds obtained by replacing benzene rings with pyridine tend to have higher biological activity or lower toxicity. Methyl 5-bromopyridine-2-carboxylate belongs to this type of compound, which is often used as an intermediate in pharmaceutical synthesis. |
preparation method | add 60 mL of 65% sulfuric acid and 40 mmol of pyridine -2-carboxylate methyl ester into a 100 mL four-mouth bottle equipped with a mechanical stirrer, a constant pressure drop funnel and a thermometer, and slowly add NaBrO3 (6.0g,40 mmol) under stirring, the temperature is controlled and the reaction is cooled at 25~35 ℃ for 4h. The reaction mixture is placed in an ice bath and neutralized with a dilute alkali solution until alkaline. Extraction with dichloromethane (15 mL × 3), anhydrous MgSO4 drying, filtering, distilled to remove solvent, reduced pressure distillation to collect fractions to obtain methyl 5-bromopyridine-2-carboxylate. |