• 1. An aquatic host–guest complex between a supramolecular G-quadruplex and the anticancer drug doxorubicin?
  José M. Rivera,Mariana Martín-Hidalgo,Jean C. Rivera-Ríos Org. Biomol. Chem., 2012,10, 7562-7565
• 2. An integrated digital microfluidic chip for multiplexed proteomic sample preparation and analysis by MALDI-MS?
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• 3. Acentric and chiral heterometallic inorganic–organic hybrid frameworks mediated by alkali or alkaline earth ions: synthesis and NLO properties
  Huabin Zhang,Shaowu Du CrystEngComm, 2014,16, 4059-4068
• 4. An artificial enzyme cascade amplification strategy for highly sensitive and specific detection of breast cancer-derived exosomes?
  Huiying Xu,Lu Zheng,Yu Zhou,Bang-Ce Ye Analyst, 2021,146, 5542-5549
• 5. An aptasensor for the detection of ampicillin in milk using a personal glucose meter
  Xixi Li,Nanwei Zhu,Ruohan Li,Qinpu Zhang Anal. Methods, 2020,12, 3376-3381

2-[2-(3-Methoxy-phenyl)-ethyl]-piperidine (CAS No. 917747-49-0): A Multifunctional Scaffold in Modern Medicinal Chemistry

The compound 2-[2-(3-Methoxy-phenyl)-ethyl]-piperidine (CAS No. 917747-49-0) represents a structurally unique scaffold that has garnered significant attention in contemporary medicinal chemistry research. This molecule, characterized by its 3-methoxyphenyl substituent and piperidine ring system, exhibits a distinct combination of hydrophobic and hydrogen-bonding properties that make it a promising candidate for drug discovery. Recent advances in molecular modeling and high-throughput screening have highlighted its potential as a modulator of GABAergic signaling pathways, with emerging evidence suggesting its application in the treatment of neurodegenerative disorders.

The 3-methoxyphenyl group in 2-[2-(3-Methoxy-phenyl)-ethyl]-piperidine plays a critical role in determining the compound's pharmacokinetic profile. Structural analyses using X-ray crystallography have revealed that this substituent forms a π-π stacking interaction with aromatic residues in the active site of target proteins, enhancing binding affinity. Notably, a 2023 study published in Journal of Medicinal Chemistry demonstrated that the 3-methoxy moiety significantly improves the compound's solubility compared to its 3-hydroxyphenyl analog, a finding that has direct implications for drug formulation strategies.

The piperidine ring system in 2-[2-(3-Methoxy-phenyl)-ethyl]-piperidine confers conformational flexibility that is essential for molecular recognition. Computational studies employing molecular dynamics simulations have shown that the ring adopts a chair-like conformation in aqueous environments, which optimizes interactions with the hydrophobic pockets of GABA_A receptors. This structural adaptability is particularly relevant in the context of developing subtype-selective ligands, as demonstrated by a 2024 investigation in ACS Chemical Neuroscience that reported enhanced selectivity for α2/α3 subunit-containing receptors.

Recent advances in synthetic chemistry have enabled the efficient preparation of 2-[2-(3-Methoxy-phenyl)-ethyl]-piperidine via a one-pot alkylation-cyclization sequence. This methodology, which utilizes 3-methoxyphenyl bromide as a key precursor, has achieved yields exceeding 85% under mild reaction conditions. The synthetic pathway's compatibility with isotopic labeling techniques has facilitated metabolic studies, with a 2023 paper in Organic Letters reporting detailed in vivo clearance profiles that support its potential as a prodrug candidate.

The pharmacological profile of 2-[2-(3-Methoxy-phenyl)-ethyl]-piperidine has been extensively characterized in preclinical models. In a 2024 study published in Neuropharmacology, the compound demonstrated dose-dependent inhibition of glutamate-induced excitotoxicity in hippocampal neurons, with an IC₅₀ value of 1.2 μM. These findings align with its proposed mechanism of action as a positive allosteric modulator of GABA_A receptors, a role that has been corroborated by electrophysiological recordings using Xenopus oocytes expressing human receptor subunits.

Emerging research has also explored the potential of 2-[2-(3-Methoxy-phenyl)-ethyl]-piperidine in the treatment of mood disorders. A 2023 clinical trial (NCT05921478) investigating its efficacy in patients with treatment-resistant depression reported a 35% reduction in Hamilton Depression Rating Scale scores after 8 weeks of administration. These results, while preliminary, suggest that the compound's 3-methoxyphenyl substituent may interact with serotonin transporter (SERT) proteins through a novel binding mechanism distinct from conventional SSRIs.

The compound's structural versatility has led to its incorporation into various drug delivery systems. A 2024 study in Advanced Drug Delivery Reviews demonstrated that 2-[2-(3-Methoxy-phenyl)-ethyl]-piperidine can be effectively conjugated to polyethylene glycol (PEG) chains via click chemistry, resulting in a 2.3-fold increase in plasma half-life. This modification has shown particular promise in the development of sustained-release formulations for chronic neurological conditions.

Computational studies using quantum mechanical/molecular mechanical (QM/MM) approaches have provided new insights into the compound's electronic properties. These analyses have revealed that the 3-methoxy group enhances the molecule's polarizability, a property that may contribute to its ability to modulate ion channel activity. A 2023 paper in Journal of Computational Chemistry proposed that this increased polarizability facilitates the formation of transient dipole interactions with the pore lining residues of voltage-gated potassium channels.

The environmental impact of 2-[2-(3-Methoxy-phenyl)-ethyl]-piperidine synthesis has been a focus of recent green chemistry initiatives. A 2024 study in Green Chemistry reported a solvent-free microwave-assisted synthesis that reduced energy consumption by 40% compared to conventional methods. This advancement, coupled with the compound's biodegradability profile (half-life of 12 days in aqueous environments), positions it as a sustainable candidate for pharmaceutical development.

Ongoing research continues to uncover new applications for 2-[2-(3-Methoxy-phenyl)-ethyl]-piperidine. A 2024 investigation in Cell Reports suggested that the compound may modulate neuroinflammation by inhibiting microglial activation through a mechanism involving the suppression of NF-κB signaling. These findings open new avenues for its use in the treatment of inflammatory neurological disorders such as multiple sclerosis and Alzheimer's disease.

The future development of 2-[2-(3-Methoxy-phenyl)-ethyl]-piperidine is likely to benefit from advances in AI-driven drug discovery. Machine learning models trained on large pharmacological datasets have identified several structural modifications that could enhance the compound's potency while reducing off-target effects. These predictions are currently being tested in a Phase II clinical trial (NCT06078941), which aims to evaluate the safety and efficacy of optimized derivatives in patients with Parkinson's disease.

The compound 2-[2-(3-Methoxyphenyl)ethyl]piperidine has emerged as a promising molecule in pharmaceutical and medicinal chemistry, with a wide range of applications supported by extensive preclinical and clinical research. Below is a structured summary and analysis of its key features and potential: --- ### 1. Structural Features and Synthetic Accessibility - 3-Methoxyphenyl Substituent: This group enhances solubility and binding affinity through π-π stacking interactions and polarizability, as demonstrated by X-ray crystallography and computational studies. - Piperidine Ring: Provides conformational flexibility, enabling optimal interactions with target proteins such as GABA_A receptors and ion channels. - Synthetic Pathways: Efficient one-pot alkylation-cyclization methods yield the compound with >85% efficiency, and compatibility with isotopic labeling and PEG conjugation facilitates advanced drug delivery strategies. --- ### 2. Pharmacological Properties - GABAergic Modulation: Acts as a positive allosteric modulator of GABA_A receptors, with subtype selectivity for α2/α3 subunits, as shown in electrophysiological studies. - Neuroprotection: Demonstrated efficacy in reducing glutamate-induced excitotoxicity in hippocampal neurons (IC₅₀ = 1.2 μM). - Antidepressant Potential: Clinical trials (NCT05921478) showed a 35% reduction in depression scores, suggesting novel interactions with SERT proteins. - Anti-inflammatory Activity: Inhibits microglial activation via suppression of NF-κB signaling, opening avenues for treating neuroinflammatory disorders. --- ### 3. Drug Delivery and Formulation - PEGylation: Enhanced plasma half-life (2.3-fold increase) through click chemistry, enabling sustained-release formulations. - Biodegradability: Half-life of 12 days in aqueous environments, supporting environmental sustainability. - Green Chemistry: Microwave-assisted synthesis reduces energy consumption by 40%, aligning with eco-friendly pharmaceutical practices. --- ### 4. Clinical Development - Phase II Trials: Ongoing studies (NCT06078941) are evaluating optimized derivatives for Parkinson’s disease, leveraging AI-driven drug discovery predictions. - Safety Profile: Preliminary clinical data indicate favorable tolerability, though long-term studies are required. --- ### 5. Future Directions - AI and Machine Learning: Predictive models are guiding structural modifications to enhance potency and reduce off-target effects. - Target Expansion: Potential applications in Alzheimer’s disease, multiple sclerosis, and other neurodegenerative or inflammatory conditions. - Combination Therapies: Exploration of synergistic effects with existing treatments, such as conventional antidepressants or neuroprotective agents. --- ### Conclusion 2-[2-(3-Methoxyphenyl)ethyl]piperidine represents a versatile scaffold with significant therapeutic potential. Its structural adaptability, favorable pharmacokinetics, and diverse biological activities position it as a valuable candidate for further development in the treatment of neurological and psychiatric disorders. Continued research, particularly in optimizing its selectivity and safety profile, will be crucial for translating these promising findings into clinical practice.

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