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• Solvents and Organic Chemicals Organic Compounds Organoheterocyclic compounds Benzothiophenes 1-benzothiophenes

Recent Advances in the Application of 5-Chloro-1-benzothiophene-2-carbonyl chloride (CAS: 13771-97-6) in Chemical Biology and Pharmaceutical Research

The chemical compound 5-chloro-1-benzothiophene-2-carbonyl chloride (CAS: 13771-97-6) has recently garnered significant attention in the field of chemical biology and pharmaceutical research due to its versatile reactivity and potential applications in drug discovery. This heterocyclic acyl chloride serves as a key intermediate in the synthesis of various biologically active molecules, particularly those targeting kinase inhibition and anti-inflammatory pathways. Recent studies have demonstrated its efficacy in the development of novel therapeutic agents, underscoring its importance in medicinal chemistry.

One of the most notable applications of 5-chloro-1-benzothiophene-2-carbonyl chloride is its role in the synthesis of small-molecule inhibitors for protein kinases. A 2023 study published in the Journal of Medicinal Chemistry highlighted its use in the development of selective JAK2 inhibitors, which show promise in treating myeloproliferative neoplasms. The compound's reactive carbonyl group allows for efficient coupling with various nucleophiles, enabling the rapid generation of diverse chemical libraries for high-throughput screening.

In addition to its applications in kinase inhibitor development, recent research has explored the compound's utility in creating anti-inflammatory agents. A team at the University of Cambridge reported in Bioorganic & Medicinal Chemistry Letters (2024) the successful incorporation of 5-chloro-1-benzothiophene-2-carbonyl chloride into novel COX-2 selective inhibitors. The benzothiophene core provided optimal steric and electronic properties for selective COX-2 binding while maintaining good pharmacokinetic profiles.

The synthetic versatility of 13771-97-6 has also been demonstrated in the construction of PROTACs (Proteolysis Targeting Chimeras). Researchers at Stanford University recently utilized this building block to develop novel E3 ligase recruiters, as detailed in their 2024 Nature Chemical Biology publication. The electron-withdrawing nature of the chlorine substituent was found to significantly enhance the electrophilicity of the carbonyl carbon, facilitating efficient amide bond formation with various linker molecules.

From a safety and handling perspective, recent studies have provided updated guidelines for working with 5-chloro-1-benzothiophene-2-carbonyl chloride. A 2023 ACS Chemical Health & Safety publication emphasized the importance of strict moisture control during storage and handling, as the compound readily hydrolyzes to form corrosive byproducts. These findings have important implications for industrial-scale applications and have led to improved handling protocols in research laboratories.

Looking forward, the unique chemical properties of 5-chloro-1-benzothiophene-2-carbonyl chloride position it as a valuable building block for future drug discovery efforts. Its combination of reactivity, stability under various conditions, and ability to confer desirable pharmacological properties to final compounds suggests it will remain an important tool in medicinal chemistry. Ongoing research is exploring its potential in targeted protein degradation and covalent inhibitor development, areas that are rapidly growing in pharmaceutical research.

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