25I-NBOH

25I-NBOH (NBOH-2CI, Cimbi-27, 2-C-I-NBOH) is a derivative of the phenethylamine-derived hallucinogen 2C-I that was discovered in 2006 by a team at Purdue University.

25I-NBOH
Legal status
Legal status
  • DE: NpSG (Industrial and scientific use only)
  • UK: Class A
Identifiers
IUPAC name
  • 2-((2-(4-Iodo-2,5-dimethoxyphenyl)ethylamino)methyl)phenol
CAS Number
PubChem CID
ChemSpider
UNII
CompTox Dashboard (EPA)
Chemical and physical data
FormulaC17H20INO3
Molar mass413.255 g·mol−1
3D model (JSmol)
SMILES
  • Oc2ccccc2CNCCc(c(OC)cc1I)cc1OC
InChI
  • InChI=1S/C17H20INO3/c1-21-16-10-14(18)17(22-2)9-12(16)7-8-19-11-13-5-3-4-6-15(13)20/h3-6,9-10,19-20H,7-8,11H2,1-2H3 Y
  • Key:FEUZHYRXGQTBRO-UHFFFAOYSA-N Y
 NY (what is this?)  (verify)

Pharmacology

25I-NBOH acts as a potent agonist of the 5HT2A receptor,[1][2] with a Ki of 0.061 nM at the human 5HT2A receptor, similar to the better-known compound 25I-NBOMe, making it some twelve times the potency of 2C-I itself.

Although in vitro tests show this compound acts as an agonist, animal studies to confirm these findings have not been reported. While the N-benzyl derivatives of 2C-I had significantly increased binding to 5HT2A receptor fragments, compared to 2C-I, the N-benzyl derivatives of DOI were less active compared to DOI.[3]

25I-NBOH is notable as one of the most selective agonist ligands for the 5-HT2A receptor with an EC50 value of 0.074 nM with more than 400 times selectivity over the 5-HT2C receptor.[4]

Analytical chemistry

25I-NBOH is a labile molecule which fragments into 2C-I when analyzed by routine gas chromatography (GC) methods.[5] A specific method for reliable identification of 25I-NBOH using GC/MS has been reported, allowing forensic forces worldwide to correctly identify this compound.[6]

Legality

Sweden

The Riksdag added 25I-NBOH to Narcotic Drugs Punishments Act under Swedish schedule I ("substances, plant materials and fungi which normally do not have medical use") as of August 18, 2015, published by Medical Products Agency MPA) in regulation HSLF-FS 2015:12 listed as "25I-NBOH" and "2-([2-(4-jodo-2,5-dimetoxifenyl)etylamino]metyl)fenol".[7]

United Kingdom

This substance is a Class A drug in the United Kingdom as a result of the N-benzylphenethylamine catch-all clause in the Misuse of Drugs Act 1971.[8]

Analogues and derivatives

Analogues and derivatives of 2C-I:

25I-NB*:

References
  1. Ettrup A, Hansen M, Santini MA, Paine J, Gillings N, Palner M, et al. (April 2011). "Radiosynthesis and in vivo evaluation of a series of substituted 11C-phenethylamines as 5-HT (2A) agonist PET tracers". European Journal of Nuclear Medicine and Molecular Imaging. 38 (4): 681–93. doi:10.1007/s00259-010-1686-8. PMID 21174090. S2CID 12467684.
  2. Silva ME, Heim R, Strasser A, Elz S, Dove S (January 2011). "Theoretical studies on the interaction of partial agonists with the 5-HT2A receptor". Journal of Computer-Aided Molecular Design. 25 (1): 51–66. Bibcode:2011JCAMD..25...51S. CiteSeerX 10.1.1.688.2670. doi:10.1007/s10822-010-9400-2. PMID 21088982. S2CID 3103050.
  3. Braden MR, Parrish JC, Naylor JC, Nichols DE (December 2006). "Molecular interaction of serotonin 5-HT2A receptor residues Phe339(6.51) and Phe340(6.52) with superpotent N-benzyl phenethylamine agonists". Molecular Pharmacology. 70 (6): 1956–64. doi:10.1124/mol.106.028720. PMID 17000863. S2CID 15840304.
  4. Hansen M, Phonekeo K, Paine JS, Leth-Petersen S, Begtrup M, Bräuner-Osborne H, Kristensen JL (March 2014). "Synthesis and structure-activity relationships of N-benzyl phenethylamines as 5-HT2A/2C agonists". ACS Chemical Neuroscience. 5 (3): 243–9. doi:10.1021/cn400216u. PMC 3963123. PMID 24397362.
  5. Arantes LC, Júnior EF, de Souza LF, Cardoso AC, Alcântara TL, Lião LM, et al. (2017). "2A receptor agonist identified in blotter paper seizures in Brazil". Forensic Toxicology. 35 (2): 408–414. doi:10.1007/s11419-017-0357-x. PMC 5486617. PMID 28706567.
  6. Neto JC, Andrade AF, Lordeiro RA, Machado Y, Elie M, Júnior EF, Arantes LC (2017). "Preventing misidentification of 25I-NBOH as 2C-I on routine GC–MS analyses" (PDF). Forensic Toxicology. 35 (2): 415–420. doi:10.1007/s11419-017-0362-0. S2CID 32432586.
  7. "Gemensamma författningssamlingen avseende hälso- och sjukvård, socialtjänst, läkeme del, folkhälsa m.m." (PDF). Lakemedelsverket. Archived from the original (PDF) on 2017-10-30. Retrieved 2017-04-21.
  8. "The Misuse of Drugs Act 1971 (Ketamine etc.) (Amendment) Order 2014". www.legislation.gov.uk.
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