148493-34-9
2,6-DICHLOROPYRIDINE-3-BORONIC ACID
CAS: 148493-34-9
Molecular Formula: C5H4BCl2NO2
148493-34-9 - Names and Identifiers
148493-34-9 - Physico-chemical Properties
| Molecular Formula | C5H4BCl2NO2 |
| Molar Mass | 191.81 |
| Density | 1.56±0.1 g/cm3(Predicted) |
| Melting Point | 150°C(lit.) |
| Boling Point | 373.7±52.0 °C(Predicted) |
| Flash Point | 179.8°C |
| Vapor Presure | 3E-06mmHg at 25°C |
| pKa | 6.40±0.58(Predicted) |
| Storage Condition | Inert atmosphere,2-8°C |
| Refractive Index | 1.58 |
| MDL | MFCD03094989 |
| Physical and Chemical Properties | Storage Conditions: Keep Cold |
148493-34-9 - Risk and Safety
| Risk Codes | R22 - Harmful if swallowed R36/37/38 - 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. S37 - Wear suitable gloves. |
| HS Code | 29333990 |
| Hazard Note | Harmful/Irritant/Keep Cold |
| Hazard Class | IRRITANT |
148493-34-9 - Reference Information
| introduction | 2,6-dichloro-3-pyridinoborate is an organic intermediate, which can be prepared in one step from 2,6-dichloropyridine as raw material. |
| application | there are reports in the literature that 2, 6-dichloro-3-pyridinoborate acid can be used to prepare a new type of dihaloacetylated heterocyclic pyrethroid. |
| preparation | drop 1.55M n-butyl lithium/n-hexane solution (20mL) into THF(60mL) solution of diisopropylamine (4mL) at -78 ℃, and then stir at the same temperature for 30 minutes. A mixture of 2,6-dichloropyridine (2.0g) and THF(10mL) was added dropwise to the solution, and then stirred at the same temperature for another 1 hour. A mixture of triisopropyl borate (6.8mL) and THF(10mL) was added dropwise, and then stirred at room temperature for 20 hours. The reaction mixture was diluted with water, then neutralized with hydrochloric acid and extracted with ethyl acetate. The organic layer is washed with water, dried with magnesium sulfate, and then concentrated under reduced pressure. 2, 6-dichloro-3-pyridinoborate (2.6g) was obtained. |
Last Update：2024-04-10 22:29:15
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View History
148493-34-9
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