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3-Bromo-5-(hydrazinecarbonyl)phenylboronic Acid (CAS 2096335-93-0): A Versatile Boronic Acid Derivative for Advanced Research

3-Bromo-5-(hydrazinecarbonyl)phenylboronic acid (CAS 2096335-93-0) is an emerging boronic acid derivative that has gained significant attention in pharmaceutical and materials science research. This compound combines the unique reactivity of arylboronic acids with the functional versatility of a hydrazinecarbonyl group, making it particularly valuable for Suzuki-Miyaura cross-coupling reactions and other advanced synthetic applications.

The molecular structure of 3-bromo-5-(hydrazinecarbonyl)phenylboronic acid features three key functional groups: a boronic acid moiety (-B(OH)₂), a bromine substituent at the 3-position, and a hydrazinecarbonyl group (-CONHNH₂) at the 5-position. This unique combination enables diverse reactivity patterns that researchers are exploring for drug discovery, bioconjugation chemistry, and materials development.

Recent studies highlight the compound's potential in covalent organic frameworks (COFs) synthesis, where its dual functionality allows for both boronate ester formation and hydrazone linkage. This has become particularly relevant as scientists search for new porous materials for gas storage and separation technologies - a hot topic in sustainable energy research.

In pharmaceutical applications, the hydrazinecarbonyl phenylboronic acid structure serves as a valuable building block for proteolysis-targeting chimeras (PROTACs) development. The boronic acid group can target specific proteins while the hydrazine moiety facilitates linker formation, addressing current challenges in targeted protein degradation therapies.

The compound's solubility properties make it suitable for various reaction conditions. It demonstrates moderate solubility in polar organic solvents like dimethyl sulfoxide (DMSO) and N,N-dimethylformamide (DMF), while being less soluble in water or non-polar solvents. This solubility profile is crucial for researchers designing heterogeneous catalytic systems or biocompatible conjugates.

Quality control of 3-bromo-5-(hydrazinecarbonyl)phenylboronic acid typically involves high-performance liquid chromatography (HPLC) analysis to ensure purity, along with nuclear magnetic resonance (NMR) spectroscopy for structural verification. The commercial availability of this compound with >95% purity has accelerated its adoption in various research programs investigating next-generation therapeutics and smart materials.

From a safety perspective, proper handling of arylboronic acid derivatives requires standard laboratory precautions. While not classified as highly hazardous, researchers should use appropriate personal protective equipment when working with this compound, especially considering its potential reactivity with strong oxidizing agents.

The synthetic versatility of 3-Bromo-5-(hydrazinecarbonyl)phenylboronic acid makes it particularly valuable in combinatorial chemistry approaches. Its multiple reactive sites allow for sequential functionalization, enabling the rapid generation of diverse molecular libraries - a strategy increasingly important in high-throughput screening programs for drug discovery.

Recent publications have demonstrated innovative applications of this compound in developing fluorescent sensors for biologically relevant molecules. The boronic acid group's ability to bind diols combined with the hydrazine moiety's condensation reactivity creates opportunities for designing selective detection systems, addressing growing needs in diagnostic technologies and environmental monitoring.

As research into boron-containing compounds continues to expand, 3-bromo-5-(hydrazinecarbonyl)phenylboronic acid stands out as a multifunctional building block with applications spanning from medicinal chemistry to advanced materials science. Its commercial availability and well-characterized properties position it as a valuable tool for scientists working at the intersection of these disciplines.

The stability profile of this compound under various conditions has been the subject of recent investigations. While arylboronic acids are generally stable to air and moisture, the presence of the hydrazinecarbonyl group introduces additional considerations for storage and handling. Optimal preservation typically involves protection from light and storage under inert atmosphere at low temperatures.

Looking forward, the unique structural features of 3-Bromo-5-(hydrazinecarbonyl)phenylboronic acid suggest potential applications in emerging fields such as bioorthogonal chemistry and click chemistry. Researchers are particularly interested in exploring its use for biomolecule labeling and surface functionalization of nanomaterials, areas that are currently receiving substantial research funding worldwide.

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