2-Fluorodeschloroketamine (2-FDCK): Chemistry, Pharmacology, Analytical Methods, Forensic Toxicology, and Regulatory Considerations (CAS 111982-50-4)
2-Fluorodeschloroketamine (2-FDCK): Chemistry, Pharmacology, Analytical Methods, Forensic Toxicology, and Regulatory Considerations (CAS 111982-50-4)
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Abstract
2-Fluorodeschloroketamine ( 2-FDCK ), also known as fluoroketamine or 2′-Fl-2-Oxo-PCM, is an arylcyclohexylamine compound that has attracted scientific interest in analytical chemistry, forensic toxicology, pharmacology, and public health surveillance. Although structurally related to ketamine, 2-FDCK differs in its chemical substitution pattern, resulting in distinct physicochemical and pharmacological characteristics that continue to be investigated.
Most published work involving 2-FDCK focuses on analytical identification, metabolism, receptor pharmacology, and forensic detection rather than therapeutic use. Because the compound has appeared in the illicit drug market in some regions, researchers and public health agencies have also studied it as part of efforts to monitor novel psychoactive substances (NPS).
This review summarizes the current scientific literature regarding its chemical identity, molecular structure, physicochemical properties, pharmacology, metabolism, analytical methods, forensic applications, laboratory safety, and international regulatory considerations.
Introduction
Novel psychoactive substances (NPS) continue to present significant challenges for analytical laboratories, clinicians, toxicologists, and regulatory agencies. Among the dissociative compounds identified in recent years, 2-Fluorodeschloroketamine ( 2-FDCK) has received growing scientific attention due to its structural similarity to ketamine and its detection in forensic casework.
United Nations Office on Drugs and Crime and the European Union Drugs Agency have highlighted the importance of monitoring emerging psychoactive substances to improve public health surveillance and forensic identification.
Unlike ketamine, which has approved medical uses in anesthesia and, in some formulations, psychiatric treatment, 2-FDCK is primarily encountered in research and forensic contexts. Scientific investigations have therefore concentrated on understanding its chemistry, metabolism, toxicology, and analytical detection.
Chemical Identity and Nomenclature
Common Names
2-Fluorodeschloroketamine is known by several names in scientific literature:
- 2-Fluorodeschloroketamine
- 2-FDCK
- Fluoroketamine
- 2′-Fl-2-Oxo-PCM
Chemical Properties
| Property | Information |
|---|---|
| Chemical Name | 2-Fluorodeschloroketamine |
| Synonyms | 2-FDCK, Fluoroketamine, 2′-Fl-2-Oxo-PCM |
| CAS Number | 111982-50-4 |
| Chemical Class | Arylcyclohexylamine |
| Typical Appearance | White crystalline solid (research reference material) |
| Primary Scientific Fields | Analytical chemistry, forensic toxicology, pharmacology |
Molecular Structure
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2-FDCK belongs to the arylcyclohexylamine family, the same structural class as ketamine and several related dissociative compounds.
Its molecular architecture includes:
- an aromatic fluorophenyl ring
- a cyclohexanone ring
- an amino substituent
Replacing chlorine with fluorine changes several physicochemical characteristics, including molecular mass and electronic properties, which may influence receptor interactions and metabolic pathways.
Physicochemical Properties
Scientific characterization typically includes measurement of:
- molecular weight
- melting point
- solubility
- chromatographic retention
- spectroscopic fingerprint
Researchers use these measurements to establish reliable reference data for analytical laboratories.
Pharmacology
NMDA Receptor Antagonism
Like ketamine, published studies suggest that 2-FDCK primarily acts through antagonism of N-methyl-D-aspartate (NMDA) receptors.
NMDA receptors regulate:
- learning
- memory
- synaptic plasticity
- excitatory neurotransmission
Blocking these receptors alters glutamatergic signaling, producing dissociative effects observed with this class of compounds.
Additional Research
Current research continues to investigate whether interactions with additional receptor systems contribute to the compound's overall pharmacological profile. Much of this work remains preclinical, and further studies are needed to clarify its mechanisms and potential clinical significance.
Pharmacokinetics and Metabolism
Knowledge of the metabolism of 2-FDCK is important for:
- forensic investigations
- toxicology screening
- clinical laboratory analysis
Studies indicate that metabolic transformation occurs primarily in the liver via enzymatic processes, yielding metabolites detectable in biological samples.
Understanding these metabolic pathways helps laboratories develop accurate methods for identifying exposure in forensic and clinical settings.
Comparison with Ketamine and Esketamine
| Feature | 2-FDCK | Ketamine | Esketamine |
|---|---|---|---|
| Chemical Class | Arylcyclohexylamine | Arylcyclohexylamine | S-enantiomer of ketamine |
| Primary Context | Research and forensic investigation | Medical anesthesia and research | Prescription treatment for treatment-resistant depression |
| Research Focus | Analytical chemistry, toxicology, pharmacology | Anesthesia, pain management, psychiatry | Psychiatry |
Although these compounds share structural similarities, they are distinct substances with different regulatory and clinical contexts.
Analytical Detection
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Reliable identification of 2-FDCK requires validated laboratory techniques.
LC-MS/MS
Liquid Chromatography–Mass Spectrometry is widely used because of its high sensitivity and specificity. It allows researchers to detect trace amounts of compounds and their metabolites in complex biological samples.
GC-MS
Gas Chromatography–Mass Spectrometry remains an important confirmatory technique in forensic laboratories. It provides characteristic fragmentation patterns useful for compound identification.
HPLC
High-Performance Liquid Chromatography is commonly used for purity assessment, separation of mixtures, and quality control of reference materials.
NMR Spectroscopy
Nuclear Magnetic Resonance spectroscopy provides detailed structural information and is frequently used to confirm molecular identity during research.
FT-IR Spectroscopy
Fourier Transform Infrared spectroscopy generates characteristic spectral fingerprints that support compound identification.
Applications in Forensic Toxicology
2-FDCK has become relevant in forensic science because it has been detected in some investigations involving novel psychoactive substances.
Common forensic applications include:
- identification of unknown substances
- toxicological screening
- method validation
- development of analytical reference libraries
- public health surveillance
These activities support accurate laboratory reporting and monitoring of emerging substances.
Laboratory Safety
Personnel working with chemical reference materials should follow established institutional safety procedures.
Recommended practices include:
- wearing appropriate personal protective equipment (PPE)
- using suitable engineering controls where required
- following institutional chemical hygiene plans
- consulting Safety Data Sheets (SDS)
- maintaining proper documentation and inventory
Handling procedures should comply with local regulations and institutional policies.
International Regulatory Considerations
The legal status of 2-FDCK varies between jurisdictions. Some countries have placed it under drug control legislation or broader laws governing novel psychoactive substances, while others regulate it through analogue or generic scheduling frameworks.
Researchers and laboratories should consult applicable national and local regulations before possessing, transporting, or studying this compound.
Current Research Directions
Ongoing scientific investigations are examining:
- receptor pharmacology
- metabolism
- analytical detection methods
- toxicological effects
- structure–activity relationships
- public health monitoring of emerging psychoactive substances
These studies contribute to improved understanding of arylcyclohexylamine compounds and support forensic and regulatory efforts.
Frequently Asked Questions
What is 2-FDCK?
2-Fluorodeschloroketamine is an arylcyclohexylamine compound that has been studied primarily in analytical chemistry, pharmacology, and forensic toxicology.
Is it the same as ketamine?
No. Although structurally related, 2-FDCK is a distinct compound with different chemical properties and regulatory status.
Why is it important in forensic science?
Its appearance among novel psychoactive substances has led laboratories to develop analytical methods for reliable detection and identification.
Which analytical methods are commonly used?
Validated methods include LC-MS/MS, GC-MS, HPLC, NMR, and FT-IR spectroscopy.
Conclusion
2-Fluorodeschloroketamine ( 2-FDCK ) is an important subject of contemporary research in analytical chemistry, forensic toxicology, and pharmacology. Its structural relationship to ketamine, combined with its emergence in forensic investigations, has made it a focus of studies aimed at improving chemical identification, understanding metabolic pathways, and monitoring novel psychoactive substances.
As research continues, collaboration among analytical laboratories, toxicologists, clinicians, and regulatory agencies will remain essential for expanding scientific knowledge, supporting public health surveillance, and ensuring accurate forensic analysis. Continued investigation using validated analytical methods and peer-reviewed research will improve understanding of this compound while promoting evidence-based scientific practice.
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