Methyl 4-(chlorosulfonyl)benzoate(CAS: 69812-51-7)

Methyl 4-(chlorosulfonyl)benzoate is a crystalline white solid with a molecular weight of approximately 261.04 g/mol. It has a high solubility in common organic solvents like dichloromethane and acetonitrile. This compound is highly reactive, particularly towards nucleophiles, making it useful in synthetic chemistry. It is insoluble in water and has a pKa of about 2.5.

Methyl 4-(chlorosulfonyl)benzoate is typically synthesized by the reaction of benzoyl chloride with sodium methoxide in a polar aprotic solvent like tetrahydrofuran (THF). The process involves the formation of a methoxy derivative followed by methanolysis, yielding the desired product. The reaction is selective and provides a good yield under mild conditions.

Methyl 4-(chlorosulfonyl)benzoate is used in various industries, including pharmaceuticals, where it serves as a precursor for the synthesis of complex organic molecules. It is also used in polymer synthesis, particularly in the development of novel materials, and in the production of electronic sensors and semiconductors. Its reactivity makes it valuable in these applications.

When handling Methyl 4-(chlorosulfonyl)benzoate, it is essential to use personal protective equipment (PPE) such as gloves, goggles, and a lab coat. Work should be conducted in a well-ventilated area or under a fume hood due to its reactive nature. Spills should be cleaned up immediately with appropriate absorbent materials, and the area should be well-ventilated. Always refer to the Safety Data Sheet (SDS) for detailed handling and disposal information.