Protonitazene hydrochloride
[CAS# 119276-01-6]

Identification

• Name: Protonitazene hydrochloride
• Synonyms: N,N-diethyl-5-nitro-2-[(4-propoxyphenyl)methyl]-1H-benzimidazole-1-ethanamine, monohydrochloride
• Molecular Formula: C₂₃H₃₁ClN₄O₃
• Molecular Weight: 446.97
• CAS Registry Number: 119276-01-6
• SMILES: CCCOC1=CC=C(C=C1)CC2=NC3=C(N2CCN(CC)CC)C=CC(=C3)[N+](=O)[O-].Cl

Properties

• Solubility: 25 mg/mL (DMF)

Safety Data

• Hazard Symbols: GHS07 Warning
• Risk Statements: H302-H312-H332
• Safety Statements: P261-P264-P280-P301+P312-P302+P352-P304+P340-P321-P330-P362+P364

Discovery and Applications

Protonitazene hydrochloride is a synthetic opioid analgesic that belongs to the benzimidazole class of opioids. It was first synthesized in the mid-20th century by a team of researchers led by Dr. Paul Janssen at Janssen Pharmaceutica, a Belgian pharmaceutical company. This research was part of broader efforts to develop new analgesics with improved efficacy and safety profiles. Protonitazene is structurally related to other potent synthetic opioids like etonitazene and is notable for its high potency and affinity for the mu-opioid receptor.

Protonitazene hydrochloride is primarily of interest for its analgesic effects. It acts on the mu-opioid receptors in the brain and spinal cord to provide pain relief. Its potency is several times greater than that of morphine, making it a potential candidate for managing severe pain, particularly in cases where other opioids are ineffective. However, due to its high potential for addiction and overdose, its use in pain management is highly controlled and typically limited to research settings rather than clinical practice.

In pharmacological and toxicological research, protonitazene hydrochloride is used as a reference compound to study the properties and effects of synthetic opioids. Researchers use it to understand opioid receptor interactions, potency, efficacy, and the development of tolerance and dependence.

Protonitazene hydrochloride serves as a structural template for the development of new synthetic opioids. By modifying its chemical structure, researchers aim to create derivatives with similar analgesic properties but reduced side effects and lower abuse potential.

In forensic toxicology, protonitazene hydrochloride is important for the identification and analysis of synthetic opioids in biological samples. With the rise of synthetic opioid use and associated fatalities, forensic scientists must detect and quantify these substances accurately. Protonitazene serves as a reference standard for analytical techniques such as mass spectrometry and chromatography.

The emergence of potent synthetic opioids like protonitazene hydrochloride has significant implications for drug regulation and public health policy. Understanding the pharmacology and toxicology of such compounds informs regulatory decisions regarding their classification and control. Efforts to curb the misuse of synthetic opioids involve setting legal frameworks and guidelines.

References

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