4-Chloro-2-fluorobenzoyl chloride(CAS: 394-39-8)

4-Chloro-2-fluorobenzoyl chloride is a white to off-white crystalline solid with a molecular weight of approximately 225.58 g/mol. It is sparingly soluble in water but soluble in organic solvents. This compound is highly reactive, particularly towards nucleophiles, making it a potent electrophile in organic synthesis. It has a pKa of around 20, indicating its acidic nature.

4-Chloro-2-fluorobenzoyl chloride is typically synthesized by chlorination of 2-fluorobenzoyl chloride with chlorine gas in the presence of a Lewis acid catalyst such as aluminum chloride. The reaction is conducted in a suitable organic solvent, and the yield can be improved by optimizing the reaction conditions and using appropriate catalysts.

4-Chloro-2-fluorobenzoyl chloride is used primarily in the pharmaceutical industry for the synthesis of various drug intermediates. It is also employed in the polymer industry for modifying polymers and in the electronics industry for use in semiconductor materials and sensors due to its functional groups that can participate in chemical reactions.

Handling 4-Chloro-2-fluorobenzoyl chloride requires strict safety measures. It should be conducted in a well-ventilated area with a fume hood. Personal protective equipment (PPE) such as gloves, goggles, and a lab coat is essential. Spills should be handled with caution, using appropriate absorbent materials, and the area should be cleaned with neutralizing agents. Always refer to the Safety Data Sheet (SDS) for detailed information on handling and storage.