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Recent Advances in the Application of 3-Bromo-5-methylbenzene-1-sulfonyl Fluoride (CAS: 1934392-03-6) in Chemical Biology and Drug Discovery

The compound 3-bromo-5-methylbenzene-1-sulfonyl fluoride (CAS: 1934392-03-6) has recently emerged as a promising chemical probe and building block in medicinal chemistry and chemical biology research. This sulfonyl fluoride derivative belongs to a class of compounds known for their unique reactivity as covalent inhibitors, particularly in targeting serine hydrolases and other nucleophilic residues in proteins. Recent studies have highlighted its potential in activity-based protein profiling (ABPP) and fragment-based drug discovery.

A 2023 study published in Journal of Medicinal Chemistry demonstrated the utility of 1934392-03-6 as a versatile warhead for developing covalent inhibitors against SARS-CoV-2 main protease. The bromo-methyl substitution pattern was found to significantly enhance membrane permeability while maintaining favorable reactivity with catalytic cysteine residues. Researchers synthesized a series of derivatives showing IC50 values in the low micromolar range, with the parent compound serving as an excellent starting point for structure-activity relationship studies.

In chemical biology applications, 3-bromo-5-methylbenzene-1-sulfonyl fluoride has shown particular promise in chemoproteomic studies. A Nature Chemical Biology publication (2024) reported its use in identifying previously unknown off-targets of clinical kinase inhibitors, leveraging the sulfonyl fluoride moiety's ability to form stable adducts with various nucleophilic amino acids. The bromine atom at the 3-position allows for subsequent functionalization via cross-coupling reactions, making this compound a valuable tool for probe development.

The synthetic accessibility of 1934392-03-6 has been improved through recent methodological advances. A 2023 Organic Process Research & Development paper described a continuous flow synthesis approach that achieves >85% yield with excellent purity (>98%), addressing previous scalability challenges. This development is particularly significant for industrial applications where multi-gram quantities are required for high-throughput screening campaigns.

Safety and stability studies (2024, Chemical Research in Toxicology) have characterized the compound's reactivity profile, showing good stability in physiological buffers (t1/2 > 24h at pH 7.4) while maintaining sufficient reactivity for target engagement. The methyl group at the 5-position was found to reduce non-specific protein binding compared to unsubstituted analogs, making it particularly useful for in-cell applications.

Looking forward, 3-bromo-5-methylbenzene-1-sulfonyl fluoride represents an important addition to the toolbox of covalent drug discovery. Its balanced reactivity profile, synthetic tractability, and versatility in subsequent derivatization position it as a valuable scaffold for both academic research and pharmaceutical development. Ongoing studies are exploring its application in targeted protein degradation and as a reporter for enzyme activity mapping in complex biological systems.

• 1936661-69-6(2,6-Dibromo-4-methylbenzene-1-sulfonyl fluoride)
• 1934815-12-9(2,5-dibromo-4-methylbenzene-1-sulfonyl fluoride)
• 498-83-9(4-Bromobenzenesulfonyl fluoride)
• 1934861-95-6(3-bromo-4-methylbenzene-1-sulfonyl fluoride)
• 454-66-0(3-methylbenzene-1-sulfonyl fluoride)
• 2302146-38-7(5-bromo-2,4-dimethylbenzene-1-sulfonyl fluoride)
• 1030832-29-1(4-bromo-3-methylbenzene-1-sulfonyl fluoride)
• 2137643-42-4(4-Bromo-2,5-dimethylbenzenesulfonyl fluoride)
• 454-65-9(3-Bromobenzenesulfonyl fluoride)
• 86146-00-1(3,5-dimethylbenzene-1-sulfonyl fluoride)