Wikipedia

Thenylfentanyl

Not to be confused with Thiafentanil or Thiofentanyl.

Thenylfentanyl is an analogue of fentanyl where the phenethylamine side-chain has been replaced by a thiophenylmethyl group. It was temporarily scheduled by the Drug Enforcement Administration in 1985,[1] due to fears it would be used as a designer drug. But in 2010 the DEA acknowledged it was essentially inactive.[2] Subsequently, the substance was since deregulated.

Thenylfentanyl
Chemical structure of thenylfentanyl
Legal status
Legal status
  • US: Unscheduled
Identifiers
  • N-Phenyl-N-[1-(thiophen-2-ylmethyl)piperidin-4-yl]propanamide
CAS Number
PubChem CID
ChemSpider
UNII
ChEMBL
CompTox Dashboard (EPA)
Chemical and physical data
FormulaC19H24N2OS
Molar mass328.47 g·mol−1
3D model (JSmol)
  • CCC(=O)N(C1CCN(CC1)CC2=CC=CS2)C3=CC=CC=C3
  • InChI=InChI=1S/C19H24N2OS/c1-2-19(22)21(16-7-4-3-5-8-16)17-10-12-20(13-11-17)15-18-9-6-14-23-18/h3-9,14,17H,2,10-13,15H2,1H3
  • Key:JSOSWRYHPGIWGT-UHFFFAOYSA-N
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The legality of fentanyl analogues vary by country. In the United States, thenylfentanyl is unscheduled.

Uses

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In much the same way that benzylfentanyl can be used to synthesize fentanyl, thenylfentanyl could ostensibly be used for the same purpose. In such a procedure, thenylfentanyl would first be de-thiophenylmethylated to norfentanyl. This would be followed by amination to fentanyl using phenethyl bromide.[3]

Chemistry

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Thenylfentanyl is a N-arylalkylamide derivative of norfentanyl. The substance is also a structural isomer of acetylthiofentanyl, wherein a methyl group on the thiophene sidechain has been relocated to the carboxamide group nearest the aniline. It is due to this reduced sidechain length that Thenylfentanyl has dramatically diminished MOR activity compared to other fentanyl analogues. Many of fentanyl’s analogues were discovered by Paul Janssen.

 
Dr. Paul Janssen

See also

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References

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  1. ^ "Schedules of Controlled Substances: Temporary Placement of Acetyl-alpha-methylfentanyl, Alpha-methylthiofentanyl, Benzylfentanyl, Beta-hydroxyfentanyl, Beta-hydroxy-3-methylfentanyl, 3-Methylthiofentanyl, Thenylfentanyl, and Thiofentanyl into Schedule I of the Controlled Substances Act" (PDF). Isomer Design. Drug Enforcement Administration. October 29, 1985. Archived (PDF) from the original on March 3, 2022. Retrieved January 16, 2023.
  2. ^ "Removal of Temporary Listing of Benzylfentanyl and Thenylfentanyl as Controlled Substances". Federal Register. Drug Enforcement Administration. June 29, 2010.
  3. ^ "Fentanyl Synthesis". GPTA India. June 18, 2020. Archived from the original on December 28, 2022.


 

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