Pyridine, 2,5-dibromo-4-methyl-
2,5-Dibromo-4-methylpyridine
CAS: 3430-26-0
Molecular Formula: C6H5Br2N
Pyridine, 2,5-dibromo-4-methyl- - Names and Identifiers
| Name | 2,5-Dibromo-4-methylpyridine |
| Synonyms | TIMTEC-BB SBB003142 2,5-Dibromo-4-methyL 2,5-Dibromo-4-picoline 2,5-DIBROMO-4-PICOLINE 2,5-Dibromo-4-methylpyridine 2.5-dibromo-4-methylpyridine 2,5-DIBROMO-4-METHYLPYRIDINE 2,3-dibromo-4-methylpyridine Pyridine, 2,5-dibromo-4-methyl- |
| CAS | 3430-26-0 |
| EINECS | 621-880-8 |
| InChI | InChI=1/C6H5Br2N/c1-4-2-6(8)9-3-5(4)7/h2-3H,1H3 |
| InChIKey | WWJLJUAHQHXDGM-UHFFFAOYSA-N |
Pyridine, 2,5-dibromo-4-methyl- - Physico-chemical Properties
| Molecular Formula | C6H5Br2N |
| Molar Mass | 250.92 |
| Density | 1.9318 (rough estimate) |
| Melting Point | 37-42 °C |
| Boling Point | 181.5°C (rough estimate) |
| Flash Point | 112.7°C |
| Vapor Presure | 0.0174mmHg at 25°C |
| Appearance | Orange low melting point solid |
| Color | Light yellow to orange |
| pKa | -0.91±0.18(Predicted) |
| Storage Condition | Inert atmosphere,Room Temperature |
| Refractive Index | 1.6300 (estimate) |
| MDL | MFCD00234955 |
Pyridine, 2,5-dibromo-4-methyl- - Risk and Safety
| Risk Codes | R36/37/38 - Irritating to eyes, respiratory system and skin. R20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. R41 - Risk of serious damage to eyes R37/38 - Irritating to respiratory system and skin. R22 - Harmful if swallowed |
| Safety Description | S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S39 - Wear eye / face protection. |
| WGK Germany | 3 |
| HS Code | 29333999 |
| Hazard Note | Harmful |
| Hazard Class | IRRITANT |
Pyridine, 2,5-dibromo-4-methyl- - Reference Information
| Introduction | 2, 5-dibromo-4-methylpyridine is a light yellow to orange low melting solid, as a drug synthesis intermediate of disopyramide, the study of its synthesis method is of great significance for improving the quality of synthetic products and reducing the content of by-products. |
| Application | 2, 5-dibromo-4-methylpyridine is mainly used in organic synthesis, in the pharmaceutical industry for the synthesis of heart disease drugs such as dipyridamole (disopyramide phosphate). Disopyramide drugs for the maintenance of atrial fibrillation and atrial flutter sinus rhythm, or to prevent ventricular tachycardia and ventricular fibrillation recurrence, can also be used for atrial premature beat, paroxysmal atrial tachycardia, ventricular premature beat and so on. |
| preparation | or preparation of target compound 2 from 2-chloro-5-bromo-4-methylpyridine, 5-dibromo-4-methylpyridine. 2, 5-dibromo-4-methylpyridine is prepared by reacting 2-chloro-5-bromo-4-methylpyridine with hydrogen bromide in acetic acid, and the hydrogen bromide is prepared by reacting sodium bromide with excess concentrated sulfuric acid. The method is easy to obtain raw materials, easy to operate and easy to separate, high reaction yield, but the reaction of sodium bromide and excess concentrated sulfuric acid to prepare hydrogen bromide, the process yield is not high, and the generated HBr will be oxidized to bromine by sulfuric acid. |
Last Update：2024-04-09 21:01:54
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View History
Pyridine, 2,5-dibromo-4-methyl-
37112-31-5
Phthalic acid bis[(tetrahydrofuran-2-yl)methyl] ester
NSC 59824
3-乙酰吲哚
spanestrin
Procion Yellow P-4G
1,2-DIPHENYL-1,2-ETHANEDIAMINE
Poly I
2-ACETAMIDOPYRIDINE-3-CARBOXYLIC ACID
37112-31-5
Phthalic acid bis[(tetrahydrofuran-2-yl)methyl] ester
NSC 59824
3-乙酰吲哚
spanestrin
Procion Yellow P-4G
1,2-DIPHENYL-1,2-ETHANEDIAMINE
Poly I
2-ACETAMIDOPYRIDINE-3-CARBOXYLIC ACID