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• Solvents and Organic Chemicals Organic Compounds Benzenoids Benzene and substituted derivatives Benzophenones

Comprehensive Overview of 2-Bromo-4'-Carboethoxybenzophenone (CAS No. 746651-78-5)

2-Bromo-4’carboethoxybenzophenone (CAS No. 746651-78-5) is a versatile organic compound with a unique structural framework that positions it as a valuable intermediate in modern synthetic chemistry. The molecule features a benzophenone core substituted with a bromine atom at the 2-position and an ethoxycarbonyl group at the 4’ position of the phenyl ring. This combination of functionalities imparts distinct reactivity profiles, making it particularly useful in cross-coupling reactions and functional group transformations. Recent advancements in C–H activation methodologies have further expanded its utility, enabling the synthesis of complex heterocyclic scaffolds relevant to pharmaceutical and materials science.

The chemical structure of 2-Bromo-4’carboethoxybenzophenone consists of two aromatic rings connected via a ketone group, with the bromine substituent serving as an excellent electrophilic handle for nucleophilic aromatic substitution or transition-metal-catalyzed couplings. The ethoxycarbonyl moiety introduces additional polarity and hydrogen-bonding capabilities, which influence the compound’s solubility and intermolecular interactions. Computational studies published in Organic Letters (2023) have demonstrated that the electronic distribution across the molecule creates asymmetric reactivity patterns, particularly in palladium-catalyzed Buchwald–Hartwig couplings where regioselectivity is critical for drug candidate optimization.

Synthesis of this compound typically involves multi-step strategies starting from substituted acetophenones or benzaldehydes. A notable approach described in Advanced Synthesis & Catalysis (Vol. 365, 2023) employs a one-pot bromination-carboxylation sequence using N-bromosuccinimide (NBS) followed by microwave-assisted Krapcho decarboxylation. This method achieves high yields (>85%) while minimizing byproduct formation through precise control of reaction parameters such as temperature and solvent polarity. Alternative routes utilizing transition-metal complexes for site-selective functionalization are currently under investigation to enhance scalability for industrial applications.

In terms of application potential, CAS No. 746651-78-5 has emerged as a key building block in medicinal chemistry programs targeting G protein-coupled receptors (GPCRs). The brominated aromatic system allows for modular modifications through Suzuki-Miyaura couplings, enabling rapid library generation for high-throughput screening campaigns. A recent study published in JACS Au (DOI: 10.1021/jacsau.3c00389) demonstrated its role in developing selective serotonin receptor modulators with improved metabolic stability compared to traditional scaffolds.

The ethoxycarbonyl functionality also contributes to its value in polymer science research. Investigations into photopolymerizable resins have shown that incorporation of this ester group enhances photoresponsiveness while maintaining thermal stability up to 300°C, as reported in Polymer Chemistry (Vol. 14, 2023). These properties make it suitable for advanced fabrication techniques like two-photon lithography used in nanoscale device manufacturing.

Safety data for handling this compound aligns with standard practices for aromatic ketones containing halogen substituents. While not classified under restricted chemical categories, appropriate personal protective equipment should be used during manipulation due to its potential skin sensitization effects observed in preliminary toxicological assessments conducted by the European Chemicals Agency (ECHA).

Ongoing research continues to explore novel applications leveraging the dual functionality of this molecule. Current projects include its use as a precursor for metalloporphyrin complexes with potential applications in photocatalytic water splitting processes and as a fluorescent probe component for bioimaging applications requiring near-infrared emission characteristics.

The growing interest in sustainable synthesis methods has led to investigations into biocatalytic approaches for functionalizing compounds like CAS No. 746651-78-5. Enzymatic oxidation pathways using laccase enzymes have shown promise in introducing hydroxyl groups at specific positions without compromising the integrity of existing functionalities, offering an eco-friendly alternative to traditional chemical oxidation methods.

In conclusion, the unique structural characteristics and reactivity profile of 2-Bromo-4’carboethoxybenzophenone position it as a strategically important intermediate across multiple scientific disciplines. Its role continues to evolve with emerging synthetic methodologies and application domains that leverage both its aromatic framework and functional group diversity.

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