Optimized Synthesis Route For 2,3-Difluoro-4-Bromobenzaldehyde
- High-Purity Intermediate: Critical for liquid crystal and pharmaceutical applications with melting point 66-67℃.
- Industrial Scalability: Optimized lithiation and formylation processes ensure consistent bulk supply.
- Quality Assurance: Comprehensive COA documentation and strict control over impurities.
In the realm of advanced organic synthesis, fluorinated aromatic aldehydes represent a critical class of building blocks. Specifically, 2,3-Difluoro-4-bromobenzaldehyde (CAS: 644985-24-0) serves as a pivotal intermediate for the production of high-performance liquid crystals and specialized agrochemicals. As demand for fluorinated fine chemicals grows, understanding the robust synthesis route and quality parameters is essential for procurement specialists and process chemists. NINGBO INNO PHARMCHEM CO.,LTD. stands as a premier partner in this sector, delivering technical excellence and reliable supply chains for complex fluorinated intermediates.
Physical and Chemical Properties
For process engineers evaluating this compound for downstream reactions, precise physical data is required to design separation and purification units. The following table outlines the key specifications derived from industrial grade material analysis:
| Property | Specification |
| CAS Number | 644985-24-0 |
| Molecular Formula | C7H3BrF2O |
| Molecular Weight | 220.999 g/mol |
| Appearance | Off-white Powder |
| Melting Point | 66-67℃ |
| Boiling Point | 239.9±40.0 °C at 760 mmHg |
| Density | 1.8±0.1 g/cm3 |
| Flash Point | 98.9±27.3 °C |
Industrial Manufacturing Process and Reaction Engineering
The production of this fluorinated aldehyde requires stringent control over reaction conditions to maximize yield and minimize halogenated by-products. The preferred manufacturing process typically involves the formylation of a brominated difluorobenzene precursor. Based on established lithiation methodologies, the synthesis begins with the preparation of the aromatic core, often starting from difluorobenzene derivatives.
In an optimized industrial setting, the reaction is conducted under an inert nitrogen atmosphere to prevent oxidation of sensitive intermediates. The process utilizes n-Butyllithium as a lithiating agent in a solvent system such as tetrahydrofuran (THF). Temperature control is critical; the reaction mixture is cooled to approximately -65℃ before the gradual addition of the lithiating agent. This low-temperature regime prevents side reactions such as benzyne formation or multiple lithiations, which can compromise industrial purity.
Following the lithiation step, the reaction mixture is maintained at low temperature before the introduction of the formylating agent, typically N,N-Dimethylformamide (DMF). The quenching process involves careful warming to -30℃ followed by hydrolysis using dilute hydrochloric acid. This sequence ensures the aldehyde group is installed regioselectively at the desired position relative to the fluorine and bromine substituents. Post-reaction workup involves phase separation, washing, and final purification via distillation or recrystallization to achieve the target melting point of 66-67℃.
Quality Control and Scalability Considerations
Scaling this chemistry from laboratory to plant scale introduces challenges related to heat transfer and mixing efficiency. Exothermic events during the lithiation and quenching phases must be managed to maintain safety and product consistency. Advanced manufacturing facilities utilize jacketed reactors with precise thermal regulation to ensure the synthesis route remains reproducible across large batches.
Quality assurance is paramount for buyers integrating this material into liquid crystal formulations. Each batch is accompanied by a comprehensive Certificate of Analysis (COA), verifying parameters such as assay purity, water content, and specific impurity profiles. High industrial purity is non-negotiable, as trace halogenated impurities can affect the electro-optical properties of the final liquid crystal display materials.
Procurement and Global Supply Chain
For procurement managers, securing a stable supply of fluorinated intermediates is a strategic priority. Market dynamics indicate that bulk price stability is influenced by the availability of raw fluorinated benzenes and regulatory compliance costs. Partnering with a reliable global manufacturer mitigates supply chain risks and ensures consistent quality.
When sourcing high-purity 4-Bromo-2,3-difluorobenzaldehyde, buyers should prioritize suppliers with proven capabilities in handling hazardous fluorinated compounds. NINGBO INNO PHARMCHEM CO.,LTD. offers competitive commercial terms and technical support to facilitate seamless integration into your production lines. Our commitment to quality ensures that the material meets the rigorous standards required for downstream synthesis.
Key Advantages of Professional Sourcing
- Consistent Quality: Strict adherence to specifications ensures reliable downstream reaction yields.
- Regulatory Compliance: Full documentation supporting HS Code 2913000090 for smooth customs clearance.
- Technical Support: Access to process data and safety information for safe handling and storage.
In conclusion, the efficient production of 4-Bromo-2,3-difluorobenzaldehyde relies on sophisticated process chemistry and rigorous quality control. By understanding the technical nuances of the manufacturing process, buyers can make informed decisions that optimize their own production costs and product performance. Selecting a partner with deep expertise in fluorinated chemistry is the most effective strategy for long-term success in the fine chemicals sector.