261762-39-4
2-Chloro-3,6-difluorobenzaldehyde
CAS: 261762-39-4
Molecular Formula: C7H3ClF2O
261762-39-4 - Names and Identifiers
| Name | 2-Chloro-3,6-difluorobenzaldehyde |
| Synonyms | TIMTEC-BB SBB003776 2-CHLORO-3,6-DIFLUOROBENZALDEHYDE 2-Chloro-3,6-difluorobenzaldehyde Benzaldehyde, 2-chloro-3,6-difluoro- |
| CAS | 261762-39-4 |
| EINECS | 625-803-9 |
| InChI | InChI=1/C7H3ClF2O/c8-7-4(3-11)5(9)1-2-6(7)10/h1-3H |
261762-39-4 - Physico-chemical Properties
| Molecular Formula | C7H3ClF2O |
| Molar Mass | 176.55 |
| Density | 1.453±0.06 g/cm3 (20 ºC 760 Torr) |
| Melting Point | 46-50 °C (lit.) |
| Boling Point | 206.4±35.0℃ (760 Torr) |
| Flash Point | 230°F |
| Vapor Presure | 0.238mmHg at 25°C |
| Storage Condition | under inert gas (nitrogen or Argon) at 2-8°C |
| Sensitive | Air Sensitive |
| Refractive Index | 1.536 |
| MDL | MFCD01631443 |
261762-39-4 - 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. |
| WGK Germany | 3 |
| HS Code | 29130000 |
| Hazard Class | IRRITANT |
261762-39-4 - Reference Information
| introduction | 2-chloro -3, 6-difluorobenzaldehyde is a pharmaceutical intermediate, which can be obtained by reacting 2-chloro -1, 4-difluorobenzene with N,N-dimethylformamide after hydrogen extraction by lithium diisopropylamino. |
| use | 2-chloro -3, 6-difluorobenzaldehyde is an aldehyde derivative, which can be used as a pharmaceutical intermediate to prepare downstream products 2-chloro -3, 6-difluorobenzonitrile. |
| Preparation | Dissolve 2-chloro-1, 4-difluorobenzene (1.78g,12.0mmol) in tetrahydrofuran (50mL) and cool to -78°C. Lithium diisopropylamide (1.8M in tetrahydrofuran, 7.3mL,13.2mmol) was added. Stir at -78 ℃ for 30 minutes, add N,N-dimethylformamide (1.05g,14.4mmol). Stir at -78°C for a further 15 minutes, add acetic acid (3mL) and water (100mL) and heat the mixture to RT. After extraction with ethyl acetate, the organic phase was washed with 1M hydrochloric acid solution and brine and dried with magnesium sulfate. Vacuum concentration produces 2-chloro-3, 6-difluorobenzaldehyde (1.51g,71% theoretical value). |
Last Update：2024-04-09 20:52:54
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