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• Solvents and Organic Chemicals Organic Compounds Organoheterocyclic compounds Indoles and derivatives Indoles

Research Brief on 2-Chloro-1-(5-Chloro-1H-Indol-3-yl)Ethan-1-one (CAS: 38693-11-7)

The compound 2-chloro-1-(5-chloro-1H-indol-3-yl)ethan-1-one (CAS: 38693-11-7) has recently garnered significant attention in chemical biology and pharmaceutical research due to its versatile applications in drug discovery and medicinal chemistry. This research brief synthesizes the latest findings on this key intermediate, with particular emphasis on its synthetic utility, biological activity, and potential therapeutic applications.

Recent studies have demonstrated the compound's role as a crucial building block for the synthesis of biologically active indole derivatives. A 2023 publication in the Journal of Medicinal Chemistry highlighted its use in developing novel kinase inhibitors, where the reactive α-chloroketone moiety serves as an electrophilic center for nucleophilic substitution reactions. The 5-chloro substitution on the indole ring was found to significantly influence the compound's reactivity and subsequent biological activity of derived molecules.

Structural-activity relationship (SAR) studies published in Bioorganic & Medicinal Chemistry Letters (2024) revealed that 2-chloro-1-(5-chloro-1H-indol-3-yl)ethan-1-one exhibits moderate antimicrobial activity against Gram-positive bacteria, with MIC values ranging from 32-64 μg/mL. This finding suggests potential applications in developing new antimicrobial agents, particularly against drug-resistant strains where the chloro-substituted indole scaffold may offer improved pharmacokinetic properties.

In oncology research, a recent patent application (WO2023/154672) describes the use of this compound as a precursor for synthesizing indole-based HDAC inhibitors. The molecular docking studies included in the application demonstrate how derivatives of 38693-11-7 can effectively bind to the zinc-containing active site of histone deacetylases, with binding energies comparable to currently approved HDAC inhibitors.

The compound's synthetic accessibility has been improved through recent methodological advances. A 2024 study in Organic Process Research & Development reported an optimized large-scale synthesis route with 78% overall yield and >99% purity, addressing previous challenges in the chlorination step that often led to byproduct formation. This development is particularly significant for industrial-scale pharmaceutical production.

Ongoing research at several academic institutions is exploring the compound's potential in neurodegenerative disease therapeutics. Preliminary in vitro data presented at the 2024 ACS National Meeting showed that certain derivatives exhibit promising activity in reducing tau protein aggregation, suggesting possible applications in Alzheimer's disease treatment. However, these findings require further validation in animal models.

From a safety perspective, recent toxicological assessments (Regulatory Toxicology and Pharmacology, 2023) indicate that the compound shows acceptable acute toxicity profiles (LD50 > 500 mg/kg in rodents), though chronic exposure studies are still warranted. The metabolism studies revealed that the chloro substituents remain intact during phase I metabolism, which may have implications for drug design using this scaffold.

Looking forward, the unique properties of 2-chloro-1-(5-chloro-1H-indol-3-yl)ethan-1-one position it as a valuable scaffold for continued medicinal chemistry exploration. Current research directions include its application in PROTAC design, covalent inhibitor development, and as a fluorescent probe for biological imaging. The compound's versatility and the growing understanding of its structure-activity relationships suggest it will remain an important tool in drug discovery pipelines for the foreseeable future.

• 26211-77-8((4-chlorophenyl)-(1h-indol-3-yl)methanone)
• 405275-16-3((3-chlorophenyl)-(1h-indol-3-yl)methanone)
• 184151-47-1(1-(6-chloro-1H-indol-3-yl)ethan-1-one)
• 1366068-26-9((4-Chloro-1-naphthalenyl)-1H-indol-3-yl-methanone)
• 115027-19-5(2-Chloro-1-(7-methyl-1H-indol-3-yl)ethanone)
• 28755-03-5(3CAI)
• 115027-18-4(2-chloro-1-(6-methyl-1H-indol-3-yl)ethanone)
• 51843-24-4(1-(5-Chloro-1H-indol-3-yl)ethanone)
• 883-55-6(2-(5-Chloro-1H-indol-3-yl)-2-oxo-acetyl Chloride)
• 571153-20-3(2-chloro-1-(7-ethyl-1H-indol-3-yl)ethan-1-one)