3-PYRIDINAMINE, 6-CHLORO-
2-Chloro-5-aminopyridine
CAS: 5350-93-6
Molecular Formula: C5H5ClN2
3-PYRIDINAMINE, 6-CHLORO- - Names and Identifiers
3-PYRIDINAMINE, 6-CHLORO- - Physico-chemical Properties
| Molecular Formula | C5H5ClN2 |
| Molar Mass | 128.56 |
| Density | 1.2417 (rough estimate) |
| Melting Point | 81-83°C(lit.) |
| Boling Point | 205.39°C (rough estimate) |
| Flash Point | 130.7°C |
| Vapor Presure | 0.00182mmHg at 25°C |
| Appearance | Bright brown crystal |
| Color | White to Brown |
| BRN | 108891 |
| pKa | 1.94±0.10(Predicted) |
| Storage Condition | Keep in dark place,Inert atmosphere,Room temperature |
| Sensitive | Sensitive to light and air |
| Refractive Index | 1.5110 (estimate) |
| MDL | MFCD00006243 |
3-PYRIDINAMINE, 6-CHLORO- - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | 36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. S37/39 - Wear suitable gloves and eye/face protection |
| WGK Germany | 3 |
| HS Code | 29333999 |
| Hazard Class | IRRITANT |
3-PYRIDINAMINE, 6-CHLORO- - Reference Information
| Introduction | 2-chloro-5-aminopyridine is a brown solid, which can be obtained by reducing nitro. |
| Uses | 2-chloro-5-aminopyridine is a pyridine derivative that can be used as a pharmaceutical intermediate. |
| preparation | 2-chloro -5-nitropyridine (5.0g,31.5mmol) is dissolved in acetic acid (50ml), iron powder (8.8g, 157.6mmol) is added in batches at room temperature, the reaction temperature is automatically increased to 80°C, the iron powder is added, and the reaction is kept at 40-50°C at room temperature for 2 hours. filter by suction, the filter residue is washed three times with a small amount of acetic acid, the filtrate is concentrated, the residue is adjusted to pH = 8 with saturated sodium bicarbonate solution, dichloromethane (100ml × 5) is extracted, the combined organic phase is washed with saturated salt water, anhydrous sodium sulfate is dried, and the compound 2-chloro-5-aminopyridine (3.9g,96%) is filtered and concentrated to be brown solid. |
Last Update：2024-04-09 20:48:19
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