🧪 2-FXiPr (2′-Fl-2-Oxo-PCiPr) — Arylcyclohexylamine Dissociative Research Compound
Overview
2-FXiPr, also referred to as 2′-Fl-2-Oxo-PCiPr, is a fluorinated arylcyclohexylamine belonging to the family of dissociative NMDA receptor antagonists, structurally related to PCP, MXPr, and Ketamine analogues.
It is a research chemical of significant forensic and analytical interest, particularly within the context of novel psychoactive substance (NPS) surveillance and structure-activity relationship (SAR) studies.
The compound features a 2-fluorophenyl ring substitution and an isopropylamino group, producing a unique balance of lipophilicity and receptor binding affinity compared to other arylcyclohexylamine derivatives.
Chemical Identity
- Full name (IUPAC): 2-(2-fluorophenyl)-2-(isopropylamino)cyclohexan-1-one
- Synonyms: 2-FXiPr, 2′-Fl-2-Oxo-PCiPr, 2-F-MXiPr
- Chemical class: Arylcyclohexylamine dissociative
- Molecular formula: C₁₅H₂₀FNO
- Molecular weight: ≈ 249.33 g/mol
- Appearance: White crystalline or fine powder (typically HCl salt form)
- Purity (research grade): ≥ 98% (analytical standard)
⚛️ Chemical & Structural Characteristics
Arylcyclohexylamines like 2-FXiPr share the same pharmacophore as PCP and ketamine, featuring:
- An aryl group (here, a 2-fluorophenyl substitution) that modulates receptor selectivity.
- A cyclohexanone core that enables NMDA channel blocking.
- A secondary amine (isopropylamino substitution) contributing to lipophilicity and altered onset profile.
The 2-fluoro substitution on the phenyl ring increases binding stability to NMDA receptors and influences metabolic resistance. Compared to 3- or 4-fluoro analogues, 2-fluoro substitution can shift both potency and dissociative depth, making 2-FXiPr notable for comparative SAR studies.
⚙️ Mechanism of Action (Class Reference)
While specific binding assays for 2-FXiPr are not yet published, analogues suggest it acts primarily as a non-competitive NMDA receptor antagonist, binding within the ion channel to block excitatory glutamate signaling.
This results in:
- CNS dissociation (disruption of sensory integration and self-perception)
- Analgesia and anesthesia at higher exposures
- Cognitive disruption and derealization in behavioral models
Some arylcyclohexylamines also show weak dopamine reuptake inhibition or sigma-1 receptor modulation, though this has not been verified for 2-FXiPr.
🧫 Pharmacological Research Profile (Predicted)
| Property | Estimate / Class Analogy |
|---|---|
| Receptor target | NMDA receptor (channel blocker) |
| Onset (in vivo rodent data) | ~10–20 min (estimated) |
| Active range (class) | sub-10 mg to low-mg/kg (varies by route) |
| Duration (class) | 2–6 hours, dependent on metabolism |
| Metabolism | Likely via CYP2B6 and CYP3A4 hydroxylation pathways |
| Toxicology | Unknown — handle as potentially neurotoxic and cardiotoxic |
Because 2-FXiPr lacks published toxicological evaluation, its biological potency and risk profile remain undetermined.
⚠️ Safety, Toxicology & Handling
Arylcyclohexylamine analogues are known for narrow safety margins and unpredictable pharmacokinetics.
Laboratories studying 2-FXiPr should maintain strict containment procedures and treat all forms as potentially hazardous.
Recommended precautions:
- Use only inside certified fume hoods with PPE (nitrile gloves, respirator, goggles).
- Avoid skin contact and aerosol formation.
- Implement double-containment and label storage clearly.
- Dispose of waste following institutional chemical hazard policy.
Potential hazards (by analogy):
- CNS depression or dissociative intoxication
- Motor impairment, respiratory suppression
- Possible neurotoxicity via NMDA blockade
- Accidental dermal exposure risk due to lipophilicity
🔬 Analytical and Forensic Use
2-FXiPr may serve as a reference compound for:
- LC–MS/MS and GC–MS method calibration in dissociative drug detection.
- Toxicological screening of unknown NPS cases.
- Comparative SAR analysis among 2-fluoro-substituted arylcyclohexylamines.
- Spectral identification of NPS seizures involving PCP-type analogues.
Analytical results indicate fragmentation patterns consistent with other 2-oxo PCP derivatives (loss of isopropylamine, characteristic m/z ~249 parent ion).
⚖️ Legal & Regulatory Context
While 2-FXiPr may not yet be explicitly scheduled in all regions, its close relation to 2-Oxo-PCP and fluorinated PCP analogues means it can fall under analogue laws or blanket NPS prohibitions.
Handling, import, or distribution should occur only under licensed laboratory authorization.
Researchers must verify national scheduling and institutional compliance before acquisition or experimentation.
Storage & Stability
- Store sealed, dry, and light-protected at ≤ 25 °C.
- Avoid humidity and direct sunlight.
- Recommended shelf life (analytical): up to 24 months if stored properly.
📌 Summary
2-FXiPr (2′-Fl-2-Oxo-PCiPr) is a fluorinated arylcyclohexylamine dissociative designed for forensic and pharmacological research on NMDA antagonists.
It provides insight into how fluorine substitution and isopropylamine side chains modify receptor activity within the PCP-ketamine chemical space.
Due to unknown toxicity and high receptor potency, 2-FXiPr is restricted to professional analytical laboratories and forensic institutions for non-clinical investigation only.
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• White Crystals
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