4-Fluoroisobutyrfentanyl

Last updated
4-Fluoroisobutyrfentanyl
4-Fluoroisobutyrfentanyl.svg
P-fluoroisobutyrylfentanyl 3D BS.png
Legal status
Legal status
Identifiers
  • N-(4-Fluorophenyl)-N-[1-(2-phenylethyl)-4-piperidinyl]-isobutanamide
CAS Number
PubChem CID
ChemSpider
UNII
KEGG
Chemical and physical data
Formula C23H29FN2O
Molar mass 368.496 g·mol−1
3D model (JSmol)
  • CC(C)C(=O)N(C1CCN(CC1)CCC2=CC=CC=C2)C3=CC=C(C=C3)F
  • InChI=1S/C23H29FN2O/c1-18(2)23(27)26(21-10-8-20(24)9-11-21)22-13-16-25(17-14-22)15-12-19-6-4-3-5-7-19/h3-11,18,22H,12-17H2,1-2H3
  • Key:OZDOSQNUJIXEOR-UHFFFAOYSA-N

4-Fluoroisobutyrylfentanyl (also known as 4-FIBF and p-FIBF) is an opioid analgesic that is an analog of butyrfentanyl and structural isomer of 4-Fluorobutyrfentanyl and has been sold online as a designer drug. [1] [2] [3] [4] [5] It is closely related to 4-fluorofentanyl, which has an EC50 value of 4.2 nM for the human μ-opioid receptor. [6] 4-fluoroisobutyrylfentanyl is a highly selective μ-opioid receptor agonist whose analgesic potency is almost ten times of that reported for morphine. [7]

Contents

Side effects

Side effects of fentanyl analogs are similar to those of fentanyl itself, which include itching, nausea and potentially serious respiratory depression, which can be life-threatening. Fentanyl analogs have killed hundreds of people throughout Europe and the former Soviet republics since the most recent resurgence in use began in Estonia in the early 2000s, and novel derivatives continue to appear. [8]

Legality

4-Fluoroisobutyrylfentanyl is a Schedule I controlled substance in the United States. [9] In the UK, it is a Class A drug. In Canada, it is a Schedule I drug.

See also

References

  1. ↑ "FIBF". Cayman Chemical.
  2. ↑ Watanabe S, Vikingsson S, Roman M, Green H, Kronstrand R, Wohlfarth A (July 2017). "In Vitro and In Vivo Metabolite Identification Studies for the New Synthetic Opioids Acetylfentanyl, Acrylfentanyl, Furanylfentanyl, and 4-Fluoro-Isobutyrylfentanyl". The AAPS Journal. 19 (4): 1102–1122. doi:10.1208/s12248-017-0070-z. PMID   28382544. S2CID   207056734.
  3. ↑ Helander A, Bäckberg M, Signell P, Beck O (July 2017). "Intoxications involving acrylfentanyl and other novel designer fentanyls - results from the Swedish STRIDA project". Clinical Toxicology. 55 (6): 589–599. doi:10.1080/15563650.2017.1303141. PMID   28349714. S2CID   11978059.
  4. ↑ Strayer KE, Antonides HM, Juhascik MP, Daniulaityte R, Sizemore IE (January 2018). "-1 Concentrations". ACS Omega. 3 (1): 514–523. doi:10.1021/acsomega.7b01536. PMC   5793031 . PMID   29399650.
  5. ↑ Pardi J, Toriello A, Cooper G (January 2020). "Evaluation of 4-fluoroisobutyrylfentanyl in blood samples from 247 authentic cases submitted to the New York City Office of Chief Medical Examiner in 2017–2018". Forensic Toxicology. 38 (2): 340–351. doi:10.1007/s11419-019-00518-6. ISSN   1860-8973. S2CID   210135027.
  6. ↑ Ulens C, Van Boven M, Daenens P, Tytgat J (September 2000). "Interaction of p-fluorofentanyl on cloned human opioid receptors and exploration of the role of Trp-318 and His-319 in mu-opioid receptor selectivity". The Journal of Pharmacology and Experimental Therapeutics. 294 (3): 1024–33. doi:10.1016/S0022-3565(24)39167-0. PMID   10945855.
  7. ↑ "4F-iBF risk assessment" (PDF). EMCDDA.
  8. ↑ Mounteney J, Giraudon I, Denissov G, Griffiths P (July 2015). "Fentanyls: Are we missing the signs? Highly potent and on the rise in Europe". The International Journal on Drug Policy. 26 (7): 626–31. doi:10.1016/j.drugpo.2015.04.003. PMID   25976511.
  9. ↑ "Controlled Substances by DEA Drug Code Number" (PDF). Drug Enforcement Administration.
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