2-氯-6-氟-苯甲醛
2-Chloro-6-fluorobenzaldehyde
CAS: 387-45-1
Molecular Formula: C7H4ClFO
2-氯-6-氟-苯甲醛 - Names and Identifiers
| Name | 2-Chloro-6-fluorobenzaldehyde |
| Synonyms | AKOS BBS-00003159 LABOTEST-BB LT00942032 2-Chlor-6-fluorbenzaldehyd 2-Chloro-6 Florobenzaldehyde 2-Choro-6-Fluoro Benzaldehyde 2-Chloro-6-fluorobenzaldehyde 4-Chloro-6-fluorobenzaldehyde 2-Fluoro-6-chloro benzaldehyde 2-fluoro-6-chlorobenzene Methylal |
| CAS | 387-45-1 |
| EINECS | 206-860-5 |
| InChI | InChI=1/C7H4ClFO/c8-6-2-1-3-7(9)5(6)4-10/h1-4H |
2-氯-6-氟-苯甲醛 - Physico-chemical Properties
| Molecular Formula | C7H4ClFO |
| Molar Mass | 158.56 |
| Density | 1.3310 (estimate) |
| Melting Point | 32-35°C(lit.) |
| Boling Point | 92 °C (10 mmHg) |
| Flash Point | 215°F |
| Water Solubility | Insoluble |
| Solubility | Chloroform (Slightly), Ethyl Acetate (Slightly) |
| Vapor Presure | 0.272mmHg at 25°C |
| Appearance | White crystal |
| Color | White to yellow |
| BRN | 2245530 |
| Storage Condition | Keep in dark place,Sealed in dry,Room Temperature |
| Sensitive | Air Sensitive |
| Refractive Index | 1.559 |
| MDL | MFCD00003306 |
| Physical and Chemical Properties | Melting Point 34-39°C boiling point 92 ° C (10 mmHg) flash point 101°C water-soluble Insoluble |
| Use | Mainly used as raw materials for the synthesis of pharmaceutical antibiotics and pesticide plant growth regulators |
2-氯-6-氟-苯甲醛 - 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. S37/39 - Wear suitable gloves and eye/face protection S36 - Wear suitable protective clothing. |
| WGK Germany | 1 |
| TSCA | T |
| HS Code | 29130000 |
| Hazard Class | IRRITANT |
2-氯-6-氟-苯甲醛 - Reference Information
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| Uses | 2-chloro-6-fluorobenzaldehyde is an important organic synthesis intermediate. In the pharmaceutical industry, 2-chloro-6-fluorobenzaldehyde is mainly used to produce fluocopenicillin with good antibacterial performance. It is a replacement product of diclofenicillin and has better curative effect; in the pesticide industry, 2-Chloro-6-fluorobenzaldehyde is mainly used in the production of high-efficiency and low-toxicity fungicides, and is called a biopesticide intermediate. 2-chloro-6-fluorobenzaldehyde is an intermediate of the plant growth regulator flufenamine. mainly used as raw materials for the synthesis of pharmaceutical antibiotics and pesticide plant growth regulators and other raw materials mainly used for the synthesis of pharmaceutical antibiotics and pesticide plant growth regulators and other raw materials mainly used as raw materials for the synthesis of pharmaceutical antibiotics and pesticide plant growth regulators and other raw materials. |
| preparation | the specific process of preparing 2-chloro -6-fluorobenzaldehyde is as follows: 1) add 250 g2-chloro -6-fluorotoluene and 0.5ml phosphorus trichloride to a 500ml four-mouth glass reaction bottle equipped with reflux condenser tube, tail gas absorption device and thermometer (adding phosphorus trichloride in this step can improve product quality), chlorine gas is introduced under the condition of keeping 180 ℃ under the irradiation of metal halide lamp. 2) use gas chromatography to detect the content of 2-chloro-6-fluorochlorobenzyl in the liquid phase of the reaction bottle. when the content of 2-chloro-6-fluorochlorobenzyl is detected to be less than 0.5%, stop passing chlorine, and at the same time introduce nitrogen into the reaction bottle to remove unreacted chlorine in the bottle. 3) add 0.5g iron-based solid super acid SO42-/Fe3O4 to the liquid phase of the reaction bottle, drop 37.5g of water into the reaction bottle at a slow and uniform speed within 2 hours at 180 ℃, keep the temperature for 4 hours, and detect the complete conversion of 2-chlorine -6-fluorobenzyl dichloride and 2-chlorine -6-fluorobenzyl trichloride by gas chromatography, under the condition of 95 ℃, sodium carbonate aqueous solution was slowly added to adjust the pH value of the mixed solution to 8, stirring for 30 minutes, and the aqueous phase and organic phase were separated after the liquid phase was stratified. The organic phase was distilled under reduced pressure to obtain 182g of 2-chloro-6-fluoro-benzaldehyde. The content detected by gas chromatography was 99.7% and the yield was 95%. the aqueous phase obtained in the above preparation process is added with activated carbon 5g and stirred for 30 minutes, then filtered to obtain colorless and transparent liquid. hydrochloric acid is used to adjust the pH value of the mixed solution to 6, and 85g of white solid 2-chloro-6-fluoro-benzoic acid is precipitated. the content detected by liquid chromatography is 99.3%, and the yield is 94.1%. |
| production method | the preparation method is 2-chloro-6-fluorotoluene as raw material and chlorinated in the presence of a catalyst to obtain 2-chloro-6-fluorobenzene dichloride, and then further hydrolysis to obtain the product. |
Last Update：2024-04-10 22:29:15
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