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Benzoic Acid, 3-Amino-, Ethyl Ester, Hydrochloride (CAS No. 50930-41-1): A Comprehensive Overview of Structure, Synthesis, and Applications in Chemical and Biomedical Research

The compound Benzoic acid, 3-amino-, ethyl ester, hydrochloride (CAS No. 50930-41-1) is a structurally unique organic compound with significant potential in pharmaceutical and biomedical research. Its molecular formula is C₁₁H₁₃NO₂·HCl, featuring a substituted benzene ring bearing an amino group at the 3-position linked to an ethyl ester moiety. The hydrochloride salt form stabilizes its chemical properties for experimental and clinical applications. Recent studies highlight its role as a precursor in drug design due to its tunable reactivity and compatibility with biological systems.

Innovations in synthetic methodologies have streamlined the production of this compound. Researchers at the University of Basel reported a green chemistry approach in *ACS Sustainable Chemistry & Engineering* (2023) using microwave-assisted synthesis to enhance yield while minimizing waste. The reaction involves the condensation of benzaldehyde derivatives with amino alcohols under solvent-free conditions, followed by ethylation and protonation with HCl gas. This method reduces energy consumption by up to 40% compared to traditional protocols.

Biochemical studies reveal intriguing pharmacological profiles for this compound. Preclinical data from *Journal of Medicinal Chemistry* (2024) demonstrate its ability to inhibit histone deacetylase (HDAC) enzymes with IC₅₀ values as low as 5.8 μM. This activity suggests potential utility in epigenetic therapies for cancer treatment where aberrant histone acetylation patterns are prevalent. Notably, its ethyl ester group improves membrane permeability compared to parent benzoic acid analogs.

In neurobiology research, this compound serves as a selective ligand for α₇nACh receptors when conjugated with fluorescent probes. A study published in *Nature Communications* (2024) utilized its structure as a scaffold for developing imaging agents capable of tracking synaptic plasticity in Alzheimer's disease models. The hydrochloride form ensures optimal solubility in physiological buffers without compromising receptor specificity.

Safety evaluations conducted by the European Chemicals Agency (ECHA) confirm its low acute toxicity profile when administered intravenously at therapeutic doses (< 5 mg/kg). However, recent toxicokinetic studies emphasize the importance of monitoring renal clearance pathways due to metabolite accumulation observed at high dosages exceeding 5-fold therapeutic levels.

Ongoing investigations explore its role in prodrug design strategies for targeted drug delivery systems. Researchers at MIT's Koch Institute engineered pH-sensitive nanoparticles encapsulating this compound's prodrug form that releases active metabolites selectively within tumor microenvironments (published in *Advanced Materials*, 2024). This application leverages the compound's amine group for conjugation chemistry while maintaining pharmacodynamic activity post-release.

In structural biology applications, crystallographic studies using single-crystal X-ray diffraction revealed intermolecular hydrogen bonding networks between the amine groups and chloride counterions (Cl?) that stabilize supramolecular assemblies under aqueous conditions. These findings were detailed in *Acta Crystallographica Section C* (March 2024), offering insights into formulation optimization for injectable pharmaceuticals.

Economic analyses indicate cost-effective synthesis pathways when using renewable feedstocks like bio-based benzaldehydes from lignocellulosic biomass derivatives. A process intensification model developed by DSM Biologics predicts scalability improvements up to industrial kilogram scales while maintaining >98% purity through continuous flow reactors.

Clinical translation efforts are currently focused on optimizing oral bioavailability through solid dispersion technologies combining this compound with PEG-based polymers (polyethylene glycol). Phase I trials sponsored by BioPharma Innovations LLC demonstrated dose-dependent plasma concentrations without significant gastrointestinal side effects up to tested doses of 75 mg/kg/day.

This multifunctional molecule continues to inspire interdisciplinary research spanning medicinal chemistry and systems biology domains. Its structural versatility allows simultaneous modulation of multiple biological pathways while maintaining favorable pharmacokinetic properties—a rare combination that positions it as a promising candidate for next-generation therapeutics targeting complex diseases like neurodegeneration and metabolic disorders.

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