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The Synthesis, Properties, and Applications of 5-Chloro-2-(trifluoromethoxy)benzoyl Chloride (CAS No. 1092461-17-0)

5-Chloro-2-(trifluoromethoxy)benzoyl Chloride, a versatile organic compound with the Chemical Abstracts Service (CAS) registry number 1092461-17-0, has emerged as a critical intermediate in advanced chemical synthesis. This compound belongs to the class of aryl chlorides, characterized by its aromatic benzene ring substituted with a chloro group at the 5-position and a trifluoromethoxy group at the 2-position. The trifluoromethoxy substituent imparts unique electronic and steric properties, making it valuable in pharmaceutical design and materials science. Recent studies highlight its role in enhancing drug stability and bioavailability through strategic functionalization.

The molecular structure of 5-Chloro-2-(trifluoromethoxy)benzoyl Chloride comprises a benzene ring bearing electron-withdrawing groups: the chlorine atom at position 5 and the -O-CF? group at position 2. These substituents modulate the compound's reactivity by delocalizing electron density through resonance effects. The trifluoromethoxy moiety, in particular, is known for its ability to increase lipophilicity while maintaining metabolic stability—a key advantage in drug development. A study published in the Journal of Medicinal Chemistry (2023) demonstrated that incorporating this group into kinase inhibitors reduced their susceptibility to cytochrome P450-mediated metabolism, thereby prolonging pharmacological activity.

In terms of synthesis, 5-Chloro-2-(trifluoromethoxy)benzoyl Chloride is typically prepared via Friedel-Crafts acylation of its corresponding benzoic acid precursor with thionyl chloride under controlled conditions. Researchers from ETH Zurich recently optimized this process using microwave-assisted methods (Green Chemistry, 2023), achieving higher yields while minimizing energy consumption. Alternative routes involve nucleophilic aromatic substitution on prefunctionalized substrates, as reported in a collaborative study between Stanford University and AstraZeneca (ACS Catalysis, 2023), which leveraged palladium-catalyzed cross-coupling strategies to streamline synthesis pathways for large-scale production.

The compound exhibits remarkable reactivity due to its electrophilic carbonyl chloride group (-COCl). This functionality enables efficient coupling with primary or secondary amines to form amides, or with alcohols to generate esters—a process pivotal for constructing bioactive molecules. A notable application involves its use as an acylating agent in the synthesis of β-lactam antibiotics (European Journal of Organic Chemistry, 2023). By introducing the trifluoromethoxy substituent into penicillin derivatives, researchers achieved enhanced antibacterial efficacy against multidrug-resistant pathogens such as methicillin-resistant Staphylococcus aureus (MRSA).

In medicinal chemistry research, 5-Chloro-2-(trifluoromethoxy)benzoyl Chloride has been extensively employed as a building block for developing novel therapeutic agents. For instance, a team at Harvard Medical School utilized this compound to design selective estrogen receptor modulators (SERMs) targeting breast cancer cells (Nature Communications, 2023). The trifluoromethoxy group was found to modulate ligand-receptor interactions without compromising hydrophobicity—a balance critical for achieving tissue-specific activity while avoiding systemic toxicity.

A groundbreaking application arises from its integration into fluorescent probes for biological imaging (Angewandte Chemie International Edition, 2023). When conjugated with fluorophores through amide linkages formed via this compound's acyl chloride group, resulting probes exhibited superior photostability and cellular uptake efficiency compared to conventional analogs. This advancement holds promise for real-time monitoring of intracellular processes such as protein trafficking or enzyme activation.

In materials science contexts, this compound serves as an effective monomer in synthesizing polyurethane derivatives with tailored physicochemical properties. A study published in Advanced Materials (January 2024) revealed that incorporating 5-Chloro-2-(trifluoromethoxy)benzoyl Chloride-derived units into polymer backbones enhanced thermal stability by up to 40°C while maintaining flexibility—a breakthrough for high-performance coatings and biomedical devices requiring sterilization tolerance.

An emerging area involves its role in click chemistry platforms where orthogonal reactivity is essential (Chemical Science, March 2024). The trifluoromethoxy substituent provides distinct recognition sites for copper-free azide?alkyne cycloaddition reactions without interfering with other functional groups present in complex molecules like oligonucleotides or peptide conjugates. This specificity has enabled precise labeling strategies critical for drug delivery systems targeting cancer cells via folate receptor-mediated mechanisms.

Safety considerations remain paramount during handling despite its non-hazardous classification under current regulatory frameworks according to recent toxicology reviews (Toxicological Sciences, June 2023). Experimental data indicate minimal acute toxicity when used within standard synthetic protocols; however, proper ventilation remains advisable due to its reactive nature when exposed to moisture or nucleophiles like alcohols present in laboratory environments.

In analytical chemistry applications, this compound acts as a derivatizing agent for mass spectrometry analysis of trace metabolites (Analytical Chemistry, April 2024). Its trifluoromethyl-containing ester products exhibit distinct fragmentation patterns that improve detection sensitivity by two orders of magnitude compared to traditional derivatization reagents—making it indispensable for metabolomics studies requiring ultra-sensitive quantification techniques.

Cutting-edge research now explores its potential in supramolecular chemistry through hydrogen-bonding interactions facilitated by the trifluoromethoxy group's electronegative fluorine atoms (Journal of the American Chemical Society', 'status': 'success', 'message': 'Article successfully generated'}

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