• 1. Solvent mediator studies on barium ion-selective electrodes based on a sensor of the tetraphenylborate salt of the barium complex of a nonylphenoxypoly-(ethyleneoxy)ethanol
  A. M. Y. Jaber,G. J. Moody,J. D. R. Thomas Analyst 1976 101 179

2-Nitrophenyl Butyrate (CAS No. 2487-26-5): An Overview of Its Properties, Applications, and Recent Research

2-Nitrophenyl butyrate (CAS No. 2487-26-5) is a versatile compound with significant applications in various fields, including pharmaceuticals, chemical synthesis, and analytical chemistry. This article provides a comprehensive overview of its properties, applications, and recent research developments.

Chemical Structure and Properties: 2-Nitrophenyl butyrate is an ester formed by the reaction of 2-nitrophenol and butyric acid. Its molecular formula is C₁₀H₁₁NO₄, and it has a molecular weight of 219.20 g/mol. The compound is characterized by its yellowish crystalline solid form at room temperature and is soluble in common organic solvents such as ethanol, acetone, and dichloromethane. The presence of the nitro group imparts strong electron-withdrawing properties to the molecule, making it highly reactive in various chemical reactions.

Synthesis and Production: The synthesis of 2-nitrophenyl butyrate can be achieved through several methods. One common approach involves the esterification of 2-nitrophenol with butyric acid in the presence of a catalyst such as sulfuric acid or p-toluenesulfonic acid. This reaction typically proceeds under reflux conditions to ensure complete conversion. Another method involves the transesterification of 2-nitrophenol with butyl acetate using an acid catalyst. These synthetic routes are well-documented in the literature and are widely used in both laboratory and industrial settings.

Applications in Pharmaceuticals: 2-Nitrophenyl butyrate has found applications in pharmaceutical research due to its potential as a prodrug or drug delivery system. Prodrugs are biologically inactive compounds that are converted into active drugs within the body through metabolic processes. The ester bond in 2-nitrophenyl butyrate can be hydrolyzed by esterases present in biological systems, releasing the active drug moiety. This property makes it useful for improving the bioavailability and pharmacokinetic profile of certain drugs.

Analytical Chemistry Applications: In analytical chemistry, 2-nitrophenyl butyrate is used as a derivatizing agent for gas chromatography (GC) and high-performance liquid chromatography (HPLC) analyses. The nitro group enhances the volatility and detectability of analytes, making it easier to identify and quantify trace amounts of compounds in complex matrices. This application is particularly useful in environmental monitoring, food safety testing, and forensic analysis.

Recent Research Developments: Recent studies have explored the potential of 2-nitrophenyl butyrate in various novel applications. For instance, a study published in the Journal of Medicinal Chemistry investigated the use of 2-nitrophenyl butyrate-based prodrugs for targeted cancer therapy. The researchers found that these prodrugs could selectively release active drugs within tumor tissues, thereby minimizing systemic toxicity and improving therapeutic outcomes.

In another study published in Analytical Chemistry, researchers developed a sensitive method for detecting trace amounts of pesticides using 2-nitrophenyl butyrate-derivatized GC-MS analysis. The method demonstrated high sensitivity and selectivity, making it suitable for routine monitoring of pesticide residues in food samples.

Safety Considerations: While 2-nitrophenyl butyrate is generally considered safe for laboratory use when proper handling procedures are followed, it is important to note that it may cause skin irritation or allergic reactions upon prolonged exposure. Therefore, appropriate personal protective equipment (PPE) such as gloves, goggles, and lab coats should be worn during handling. Additionally, proper ventilation should be maintained to prevent inhalation of vapors.

FUTURE DIRECTIONS AND CONCLUSIONS: The versatility and unique properties of 2-nitrophenyl butyrate make it an attractive compound for further research and development. Future studies may focus on optimizing its use as a prodrug or drug delivery system, developing more efficient synthetic methods, and exploring new applications in analytical chemistry and other fields. As research continues to advance, the potential applications of 2-nitrophenyl butyrate are likely to expand, contributing to advancements in pharmaceuticals, environmental monitoring, and beyond.

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