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2,5-Dimethoxy-4-bromoamphetamine

From Wikipedia, the free encyclopedia
Chemical compound

Pharmaceutical compound
DOB
INN: Brolamfetamine
Chemical structure of (±)-DOB
Ball-and-stick model of (R)-DOB
Clinical data
Other namesDOB; 4-Bromo-2,5-dimethoxyamphetamine; Brolamfetamine; Brolamphetamine; Bromo-DMA; 2,5-Dimethoxy-4-bromo-α-methylphenethylamine; 4-Bromo-2,5-dimethoxyphenyl-isopropylamine
Routes of
administration
Oral
Drug classSerotonin5-HT2 receptoragonist;Serotonergic psychedelic;Hallucinogen
ATC code
  • None
Legal status
Legal status
Identifiers
  • 1-(4-bromo-2,5-dimethoxyphenyl)propan-2-amine
CAS Number
PubChemCID
PubChem SID
IUPHAR/BPS
DrugBank
ChemSpider
UNII
KEGG
ChEMBL
CompTox Dashboard(EPA)
Chemical and physical data
FormulaC11H16BrNO2
Molar mass274.158 g·mol−1
3D model (JSmol)
Melting point63–65 °C (145–149 °F)
(207–208 °Chydrochloride)
  • CC(CC1=CC(=C(C=C1OC)Br)OC)N
  • InChI=1S/C11H16BrNO2/c1-7(13)4-8-5-11(15-3)9(12)6-10(8)14-2/h5-7H,4,13H2,1-3H3 checkY
  • Key:FXMWUTGUCAKGQL-UHFFFAOYSA-N checkY
  (verify)

Dimethoxybromoamphetamine (DOB), also known asbrolamfetamine (INNTooltip International Nonproprietary Name),[2] is apsychedelic drug of thephenethylamine,amphetamine, andDOx families.[3] For many years, prior to the discovery of newer agents such asDOTFM,FLY compounds likeBromo-DragonFLY, andNBOMe compounds like25I-NBOMe, DOB was the mostpotent known phenethylamine psychedelic.[3]

The drug acts as anagonist of theserotonin5-HT2 receptors, including of the serotonin5-HT2A receptor.[4][5]

DOB was firstsynthesized byAlexander Shulgin in 1967 and was described by him and his colleagues in thescientific literature in 1971.[6][7] Shulgin subsequently further described the effects of DOB in his 1991 bookPiHKAL (Phenethylamines I Have Known and Loved).[6]

Use and effects

[edit]

In his bookPiHKAL,Alexander Shulgin gives the dose range of DOB as 1 to 3 mg and itsduration as 18 to 30 hours.[6] In other publications, he specifies the dose range as 2 to 3 mg forracemic DOB and 1 to 2 mg for the preferentially active (R)-DOBenantiomer, while the duration is stated as being extremely long, a plateau occurring between 4 to 10 hours, and returning to baseline after 24 to 36 hours.[3] DOB was described as producing effects such asclosed-eye andopen-eyepsychedelic visuals andintrospection, among others.[6][3]

At a low sub-hallucinogenic dose of 0.4 mg DOB, the drug was alsopsychoactive and produced effects including enhancedvisual perception, some strengthening of colors, enrichedemotional affect, a comfortable and good feeling, and colorful and importantdreams.[3]

Side effects

[edit]

Side effects of DOB includebody load,muscle tremors,muscle cramps,attention lapses described as "littlefugue states",sleeping difficulties, andbizarre dreams.[3]

Overdose

[edit]

Overdose of DOB has been reported to producecardiovascular symptoms andconvulsions.[3] Excessively high doses of DOB may cause diffusearterial spasm.[8] The vasospasm responded readily to intra-arterial and intravenousvasodilators, such astolazoline.[8] A 35 mg overdose resulted in death, while a 75 mg overdose in a person withtolerance resulted inergotism-like complications that requiredamputation.[3]

Interactions

[edit]
See also:Psychedelic drug § Interactions, andTrip killer § Serotonergic psychedelic antidotes

DOB may interact synergistically withalcohol.[3]

Pharmacology

[edit]

Pharmacodynamics

[edit]
DOB activities
TargetAffinity (Ki, nM)
5-HT1A2,550–7,904
5-HT1B941
5-HT1D636
5-HT1E556–1,427
5-HT1FND
5-HT2A0.6–81 (Ki)
0.52–50 (EC50Tooltip half-maximal effective concentration)
57–105% (EmaxTooltip maximal efficacy)
5-HT2B2.9–44 (Ki)
2.82–65 (EC50)
70–100% (
Emax)
5-HT2C1.3–78 (Ki)
0.25–102 (EC50)
58–112% (
Emax)
5-HT3>10,000
5-HT4ND
5-HT5A5,311
5-HT65,535
5-HT7506
α1A,α1B>10,000
α1DND
α2A4,266
α2B1,527
α2C594
β12,425
β2303
D1,D2>10,000
D3808
D4,D5>10,000
H19,120
H2H4>10,000
M1,M2>10,000
M31,152
M4,M5>10,000
TAAR1>1,000
I11,596
σ12,193
σ2>10,000
SERTTooltip Serotonin transporter8,538 (Ki)
NETTooltip Norepinephrine transporter>10,000 (Ki)
DATTooltip Dopamine transporter>10,000 (Ki)
MAO-ATooltip Monoamine oxidase A100,000 (IC50Tooltip half-maximal inhibitory concentration) (rat)
MAO-BTooltip Monoamine oxidase B>100,000 (IC50) (rat)
Notes: The smaller the value, the more avidly the drug binds to the site. All proteins are human unless otherwise specified.Refs:[9][10][4][11][12][13][14][15][5][16][17]

DOB is aserotonin5-HT2A,5-HT2B, and5-HT2C receptoragonist.[4][5] Its psychedelic effects are mediated by itsagonistic properties at the 5-HT2A receptor. Due to its selectivity, DOB is often used in scientific research when studying the5-HT2 receptor subfamily.

It is a very weakagonist of the humantrace amine-associated receptor 1 (TAAR1) and a weak agonist of therhesus monkey TAAR1.[17][5] In contrast to theserotonin releasing agentMDMA, DOB does not produceprotein kinase C (PKC) activation in the brains of rodentsin vivo.[18][19] The PKC activation by MDMA appears to be dependent onuptake by theserotonin transporter (SERT).[18][19]

DOB has been found to reduceaggression in rats.[20][21]

DOB is one of the most potent compounds inPiHKAL; while the active dose is similar to that ofDOI, another psychedelic amphetamine, DOB has been shown to have a higher efficacy in triggering downstream effects mediated by serotonin 5-HT2 receptors.[22]

Chemistry

[edit]
Tabs of DOB, confiscated by police inConcord, California in 2006.

The full name of the chemical is 2,5-dimethoxy-4-bromoamphetamine. DOB has astereocenter andR-(−)-DOB is theeutomer. This is an important finding as it is suggestive that it is targeting different receptors relative to most otherphenethylamines (e.g.MDMA) where theR-isomer serves as thedistomer.

Omission of the amphetamine related α-methyl leads to2C-B, a compound that possesses a lower affinity for the 5-HT2A receptor and is a weaker receptor agonist.[citation needed] Otheranalogues of DOB include4C-B,Bromo-DragonFLY,DOB-FLY, and25B-NBOMe, among others.

History

[edit]

DOB was firstsynthesized byAlexander Shulgin in 1967.[6] It was first described in thescientific literature in a paper by Shulgin,Claudio Naranjo, and another colleague in 1971.[7] TheINNTooltip International Nonproprietary Name of DOB,brolamfetamine, was proposed and recommended by theWorld Health Organization (WHO) in 1986.[23][24] This was the same year that theMultidisciplinary Association for Psychedelic Studies (MAPS) was founded.[25] DOB was registered with the WHO as a supposed "anorexic" (appetite suppressant).[26]

Society and culture

[edit]

Legal status

[edit]

Internationally, DOB is a Schedule I substance under theConvention on Psychotropic Substances and the drug is legal only for medical, industrial or scientific purposes.[27]

Canada

[edit]

Listed as aSchedule 1 as it is an analogue of amphetamine.[28]

Australia

[edit]

DOB is considered a Schedule 9 prohibited substance in Australia under thePoisons Standard (February 2017).[29] A Schedule 9 substance is a substance which may be abused or misused, the manufacture, possession, sale or use of which should be prohibited by law except when required for medical or scientific research, or for analytical, teaching or training purposes with approval of Commonwealth and/or State or Territory Health Authorities.[29]

Russia

[edit]

Schedule I, possession of at least 10 mg is a criminal offence.[30]

United Kingdom

[edit]

DOB is aClass A drug in the United Kingdom under theMisuse of Drugs Act 1971.

United States

[edit]

DOB is aSchedule Icontrolled substance under federal law in theUnited States.[31] It was scheduled in 1973.[32]

See also

[edit]

References

[edit]
  1. ^Anvisa (24 July 2023)."RDC Nº 804 - Listas de Substâncias Entorpecentes, Psicotrópicas, Precursoras e Outras sob Controle Especial" [Collegiate Board Resolution No. 804 - Lists of Narcotic, Psychotropic, Precursor, and Other Substances under Special Control] (in Brazilian Portuguese).Diário Oficial da União (published 25 July 2023).Archived from the original on 2023-08-27. Retrieved2023-08-27.
  2. ^World Health Organization (2000).International Nonproprietary Names (INN) for Pharmaceutical Substances. World Health Organization.ISBN 978-0-11-986227-0.
  3. ^abcdefghiShulgin A (1981)."Profiles of Psychedelic Drugs: 10. DOB".J Psychoactive Drugs.13 (1): 99.doi:10.1080/02791072.1981.10471457.PMID 7277091. Archived fromthe original on 2025-07-12.
  4. ^abcRay TS (February 2010)."Psychedelics and the human receptorome".PLOS ONE.5 (2) e9019.Bibcode:2010PLoSO...5.9019R.doi:10.1371/journal.pone.0009019.PMC 2814854.PMID 20126400.
  5. ^abcdRudin D, Luethi D, Hoener MC, Liechti ME (2022)."Structure-activity Relation of Halogenated 2,5-Dimethoxyamphetamines Compared to their α‑Desmethyl (2C) Analogues".The FASEB Journal.36 (S1) fasebj.2022.36.S1.R2121.doi:10.1096/fasebj.2022.36.S1.R2121.ISSN 0892-6638.
  6. ^abcdeErowid Online Books: "PiHKAL" - #62 DOB
  7. ^abShulgin AT, Sargent T, Naranjo C (1971)."4-Bromo-2,5-dimethoxyphenylisopropylamine, a new centrally active amphetamine analog".Pharmacology.5 (2):103–107.doi:10.1159/000136181.PMID 5570923.S2CID 46844380.
  8. ^abBowen JS, Davis GB, Kearney TE, Bardin J (March 1983). "Diffuse vascular spasm associated with 4-bromo-2,5-dimethoxyamphetamine ingestion".JAMA.249 (11):1477–1479.doi:10.1001/jama.1983.03330350053028.PMID 6827726.
  9. ^"PDSP Database".UNC (in Zulu). Retrieved2025-02-04.
  10. ^Liu T."BindingDB BDBM50005257 (+)-2-(4-Bromo-2,5-dimethoxy-phenyl)-1-methyl-ethylamine::(+)2-(4-Bromo-2,5-dimethoxy-phenyl)-1-methyl-ethylamine::(+/-)2-(4-Bromo-2,5-dimethoxy-phenyl)-1-methyl-ethylamine::(-)-2-(4-Bromo-2,5-dimethoxy-phenyl)-1-methyl-ethylamine::(-)2-(4-Bromo-2,5-dimethoxy-phenyl)-1-methyl-ethylamine::1-(4-bromo-2,5-dimethoxyphenyl)propan-2-amine::2-(2-Methoxy-phenyl)-1-methyl-ethylamine::2-(4-Bromo-2,5-dimethoxy-phenyl)-1-methyl-ethylamine::2-(4-Bromo-2,5-dimethoxy-phenyl)-1-methyl-ethylamine((-)-DOB)::2-(4-Bromo-2,5-dimethoxy-phenyl)-1-methyl-ethylamine((R)-(-)-DOB)::2-(4-Bromo-2,5-dimethoxy-phenyl)-1-methyl-ethylamine((S)-(+)-DOB)::2-(4-Bromo-2,5-dimethoxy-phenyl)-1-methyl-ethylamine(DOB)::2-(4-Bromo-2,5-dimethoxy-phenyl)-1-methyl-ethylamine[R(-)DOB]::2-(5-Bromo-2,4-dimethoxy-phenyl)-1-methyl-ethylamine::Brolamfetamine::CHEMBL6607::DOB::Racemic DOB".BindingDB. Retrieved2025-02-04.
  11. ^van Wijngaarden I, Soudijn W (1997). "5-HT2A, 5-HT2B and 5-HT2C receptor ligands".Pharmacochemistry Library. Vol. 27. Elsevier. pp. 161–197.doi:10.1016/s0165-7208(97)80013-x.ISBN 978-0-444-82041-9.
  12. ^Acuña-Castillo C, Villalobos C, Moya PR, Sáez P, Cassels BK, Huidobro-Toro JP (June 2002)."Differences in potency and efficacy of a series of phenylisopropylamine/phenylethylamine pairs at 5-HT(2A) and 5-HT(2C) receptors".Br J Pharmacol.136 (4):510–519.doi:10.1038/sj.bjp.0704747.PMC 1573376.PMID 12055129.
  13. ^Hemanth P, Nistala P, Nguyen VT, Eltit JM, Glennon RA, Dukat M (2023)."Binding and functional structure-activity similarities of 4-substituted 2,5-dimethoxyphenyl isopropylamine analogues at 5-HT2A and 5-HT2B serotonin receptors".Frontiers in Pharmacology.14 1101290.doi:10.3389/fphar.2023.1101290.PMC 9902381.PMID 36762110.
  14. ^Reyes-Parada M, Iturriaga-Vasquez P, Cassels BK (2019)."Amphetamine Derivatives as Monoamine Oxidase Inhibitors".Front Pharmacol.10 1590.doi:10.3389/fphar.2019.01590.PMC 6989591.PMID 32038257.
  15. ^Scorza MC, Carrau C, Silveira R, Zapata-Torres G, Cassels BK, Reyes-Parada M (December 1997)."Monoamine oxidase inhibitory properties of some methoxylated and alkylthio amphetamine derivatives: structure-activity relationships".Biochem Pharmacol.54 (12):1361–1369.doi:10.1016/s0006-2952(97)00405-x.PMID 9393679.
  16. ^Wallach J, Cao AB, Calkins MM, Heim AJ, Lanham JK, Bonniwell EM, et al. (December 2023)."Identification of 5-HT2A receptor signaling pathways associated with psychedelic potential".Nat Commun.14 (1) 8221.Bibcode:2023NatCo..14.8221W.doi:10.1038/s41467-023-44016-1.PMC 10724237.PMID 38102107.
  17. ^abLewin AH, Miller GM, Gilmour B (December 2011)."Trace amine-associated receptor 1 is a stereoselective binding site for compounds in the amphetamine class".Bioorganic & Medicinal Chemistry.19 (23):7044–7048.doi:10.1016/j.bmc.2011.10.007.PMC 3236098.PMID 22037049.
  18. ^abKramer HK, Poblete JC, Azmitia EC (September 1997). "Activation of protein kinase C (PKC) by 3,4-methylenedioxymethamphetamine (MDMA) occurs through the stimulation of serotonin receptors and transporter".Neuropsychopharmacology.17 (3):117–129.doi:10.1016/S0893-133X(97)00026-2.PMID 9272479.
  19. ^abKenneth H (1996)."Evidence for the involvement of the serotonin uptake transporter and the serotonin-2 receptor in the activation of protein kinase C (PKC) by substituted amphetamines in the adult rodent brain".ProQuest. New York University. Retrieved2025-02-01.MDMA manifests its acute psychotropic and neurotoxic effects by releasing 5-HT from nerve endings. MDMA also shows a moderate agonist-like affinity (1.5-3.2 mM [(sic)]) for the central 5-HT2 receptor. Activation of this receptor stimulates the translocation/activation of protein kinase C (PKC) and the release of Ca2+ from intracellular sequestration sites. MDMA has already been shown to increase [Ca2+], and this may proceed through the activation of this receptor. [...] In vivo, both MDMA and PCA were found to produce a lasting translocation of [protein kinase C (PKC)] in the cortex and hippocampus of treated rats. Fluoxetine, a 5-HT uptake inhibitor, prevents PKC translocation, while ketanserin, a 5-HT2A antagonist, acts similarly but a diminished efficacy. Non-neurotoxic drugs like fluoxetine, DOB, and cocaine were devoid of MDMA's long-term PKC translocating abilities, and suggests that receptor stimulation alone is not the sole mechanism. In synaptosomes, MDMA was effective at producing PKC translocation by binding to the 5-HT uptake carner. This in vitro response [of] fluoxetine reverses this response and demonstrates that MDMA translocates PKC within the 5-HT nerve terminal.
  20. ^Morrison TR, Melloni RH (2014). "The role of serotonin, vasopressin, and serotonin/vasopressin interactions in aggressive behavior".Neuroscience of Aggression. Curr Top Behav Neurosci. Vol. 17. pp. 189–228.doi:10.1007/7854_2014_283.ISBN 978-3-662-44280-7.PMID 24496652.Another 5HT2A receptor partial agonist, DOB, has a marginally higher affinity for the 5HT2A receptor (in its low affinity state) than DOI (Roth et al. 1997), and in the water competition (WC) test it has been shown to block defensive aggression in rats. Interestingly, DOI also reduced the number of offensive aggressive behaviors (i.e., attacks, greater latency to first attack, shorter attack duration) in the same animals that exhibited DOI-induced reductions in defensive behaviors during the WC test (Muehlenkamp et al. 1995).
  21. ^Muehlenkamp F, Lucion A, Vogel WH (April 1995). "Effects of selective serotonergic agonists on aggressive behavior in rats".Pharmacology Biochemistry and Behavior.50 (4):671–674.doi:10.1016/0091-3057(95)00351-7.PMID 7617717.S2CID 12774131.
  22. ^Parrish JC, Braden MR, Gundy E, Nichols DE (December 2005)."Differential phospholipase C activation by phenylalkylamine serotonin 5-HT 2A receptor agonists".Journal of Neurochemistry.95 (6):1575–1584.doi:10.1111/j.1471-4159.2005.03477.x.PMID 16277614.S2CID 24005602.
  23. ^"INN Proposed List 55".World Health Organization (WHO). 9 April 1986. Retrieved2024-11-03.
  24. ^"INN Recommended List 26".World Health Organization (WHO). 9 June 1986. Retrieved2024-11-03.
  25. ^Emerson A, Ponté L, Jerome L, Doblin R (2014)."History and future of the Multidisciplinary Association for Psychedelic Studies (MAPS)".J Psychoactive Drugs.46 (1):27–36.doi:10.1080/02791072.2014.877321.PMID 24830183.
  26. ^World Health Organization (2024)."Use of stems in the selection of International Nonproprietary Names (INN) for pharmaceutical substances, 2024"(PDF). World Health Organization. pp. 152–153. Retrieved2024-10-21.
  27. ^"List of psychotropic substances under international control"(PDF). Archived fromthe original(PDF) on 2007-03-02. Retrieved2007-03-30.
  28. ^"(15) 4-Bromo-2,5-dimethoxyamphetamine (4-Bromo-2,5-dimethoxy-α-methylbenzeneethanamine)".Isomer Design. Archived fromthe original on 2021-11-23.
  29. ^abDepartment of Health and Aged Care (October 2015)."Poisons Standard".Federal Register of Legislation. Australian Government.
  30. ^"Об утверждении значительного, крупного и особо крупного размеров наркотических средств и психотропных веществ, а также значительного, крупного и особо крупного размеров для растений, содержащих наркотические средства или психотропные вещества, либо их частей, содержащих наркотические средства или психотропные вещества, для целей статей 228, 228.1, 229 и 229.1 Уголовного кодекса Российской Федерации" [On approval of significant, large and especially large sizes of narcotic drugs and psychotropic substances, as well as significant, large and especially large sizes for plants containing narcotic drugs or psychotropic substances, or their parts containing narcotic drugs or psychotropic substances, for the purposes of Articles 228, 228.1, 229 and 229.1 of the Criminal Code of the Russian Federation].Постановление Правительства РФ от 01.10.2012 N 1002 [Resolution of the Government of the Russian Federation of 01.10.2012 N 1002] (in Russian).
  31. ^Shulgin A, Manning T, Daley PF (2011).The Shulgin Index, Volume One: Psychedelic Phenethylamines and Related Compounds. Vol. 1. Berkeley: Transform Press. p. 102.ISBN 978-0-9630096-3-0.
  32. ^Bartels Jr JR (14 September 1973)."Part 308 – Schedules of Controlled Substances; Additions to Schedule I"(PDF).Federal Register. Vol. 38, no. 183.Drug Enforcement Administration. Archived fromthe original(PDF) on 2022-03-03. Retrieved2023-09-30 – via Isomer Design.

External links

[edit]
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Notes: (1) TAAR1 activity of ligands varies significantly between species. Some agents that are TAAR1 ligands in some species are not in other species. This navbox includes all TAAR1 ligands regardless of species. (2) See the individual pages for references, as well as theList of trace amines,TAAR, andTAAR1 pages.
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