2,5-Dimethoxy-4-butylamphetamine

DOBU
Clinical data
Other names	DOBU; 2,5-Dimethoxy-4-butylamphetamine; 4-Butyl-2,5-dimethoxyamphetamine
Drug class	Serotonin 5-HT2 receptor agonist
Identifiers
	IUPAC name 1-(4-butyl-2,5-dimethoxyphenyl)propan-2-amine;
CAS Number	63779-89-5 ;
PubChem CID	10060720;
ChemSpider	8236274 ;
UNII	6ARH6DPN4N;
ChEMBL	ChEMBL8214 ;
CompTox Dashboard (EPA)	DTXSID90434976 ;
Chemical and physical data
Formula	C15H25NO2
Molar mass	251.370 g·mol−1
3D model (JSmol)	Interactive image;
	SMILES C1(=CC(=C(C=C1CC(C)N)OC)CCCC)OC;
	InChI InChI=1S/C15H25NO2/c1-5-6-7-12-9-15(18-4)13(8-11(2)16)10-14(12)17-3/h9-11H,5-8,16H2,1-4H3 ; Key:NGVDYAULSQKEGW-UHFFFAOYSA-N ;
	(verify)

2,5-Dimethoxy-4-butylamphetamine (DOBU) is a lesser-known serotonin receptor agonist of the amphetamine and DOx families.

Effects

DOBU was first synthesized by Alexander Shulgin. In his book PiHKAL (Phenethylamines i Have Known And Loved), only low dosages of 2 to 3 mg were tested, with the duration simply listed as "very long". DOBU produces paresthesia and difficulty sleeping, but with few other effects.

Pharmacology

Compared to shorter chain homologues such as DOM, DOET, and DOPR which are all potent hallucinogens, DOBU has an even stronger serotonin 5-HT₂ receptor affinity, but fails to substitute for hallucinogens in animal drug discrimination tests or produce hallucinogenic effects in humans.^[1] These findings suggest that it has low efficacy and is thus an antagonist or weak partial agonist at the serotonin 5-HT_2A receptor. However, DOBU has since been found to act as a full agonist of the serotonin 5-HT_2A receptor.^[2] Hence, the reasons for the lack of psychedelic effects with DOBU remain unknown.^[2] DOBU is inactive as an agonist of the serotonin 5-HT_2B receptor though still shows affinity for the serotonin 5-HT_2C receptor.^[2]

Chemistry

Isomers

Alternative skeletal isomers of DOBU can also be produced, where the 4-(n-butyl) group of DOBU is replaced with any of the three other butyl isomers, the iso-butyl, sec-butyl and tert-butyl compounds being called DOIB, DOSB, and DOTB, respectively.^[3]^[4]^[5] All are significantly less potent than DOBU, with DOIB being active at around 10–15 mg, and DOSB at 25–30 mg.^[3] The most highly branched isomer DOTB was completely inactive in both animal and human trials.^[3] However, it was also reported that DOTB and DOAM partially generalized to DOM in animal drug discrimination tests.^[6]

References

^ Seggel MR, Yousif MY, Lyon RA, Titeler M, Roth BL, Suba EA, Glennon RA (March 1990). "A structure-affinity study of the binding of 4-substituted analogues of 1-(2,5-dimethoxyphenyl)-2-aminopropane at 5-HT2 serotonin receptors". Journal of Medicinal Chemistry. 33 (3): 1032–1036. doi:10.1021/jm00165a023. PMID 2308135.
^ ^a ^b ^c Luethi, Dino; Rudin, Deborah; Hoener, Marius C.; Liechti, Matthias E. (2022). "Monoamine Receptor and Transporter Interaction Profiles of 4-Alkyl-Substituted 2,5-Dimethoxyamphetamines" (PDF). The FASEB Journal. 36 (S1). doi:10.1096/fasebj.2022.36.S1.R2691. ISSN 0892-6638.
^ ^a ^b ^c ^d Nichols DE, Glennon RA (1984). "Medicinal Chemistry and Structure-Activity Relationships of Hallucinogens". In Jacobs BL (ed.). Hallucinogens: Neurochemical, Behavioral, and Clinical Perspectives. New York: Raven Press. pp. 95–142. ISBN 978-0-89004-990-7. OCLC 10324237.
^ ^a ^b Jacob P, Shulgin AT (1994). "Structure-activity relationships of the classic hallucinogens and their analogs" (PDF). NIDA Res Monogr. 146: 74–91. PMID 8742795.
^ ^a ^b Shulgin, Alexander T. (2003). "Basic Pharmacology and Effects". In Laing, Richard R. (ed.). Hallucinogens: A Forensic Drug Handbook. Forensic Drug Handbook Series. Elsevier Science. pp. 67–137. ISBN 978-0-12-433951-4. Retrieved 1 February 2025.
^ Glennon RA, Young R, Rosecrans JA (April 1982). "A comparison of the behavioral effects of DOM homologs". Pharmacol Biochem Behav. 16 (4): 557–559. doi:10.1016/0091-3057(82)90414-2. PMID 7071089.

External links

[SeggelYousifLyon1990-1] Seggel MR, Yousif MY, Lyon RA, Titeler M, Roth BL, Suba EA, Glennon RA (March 1990). "A structure-affinity study of the binding of 4-substituted analogues of 1-(2,5-dimethoxyphenyl)-2-aminopropane at 5-HT2 serotonin receptors". Journal of Medicinal Chemistry. 33 (3): 1032–1036. doi:10.1021/jm00165a023. PMID 2308135.

[LuethiRudinHoener2022-2] Luethi, Dino; Rudin, Deborah; Hoener, Marius C.; Liechti, Matthias E. (2022). "Monoamine Receptor and Transporter Interaction Profiles of 4-Alkyl-Substituted 2,5-Dimethoxyamphetamines" (PDF). The FASEB Journal. 36 (S1). doi:10.1096/fasebj.2022.36.S1.R2691. ISSN 0892-6638.

[NicholsGlennon1984-3] Nichols DE, Glennon RA (1984). "Medicinal Chemistry and Structure-Activity Relationships of Hallucinogens". In Jacobs BL (ed.). Hallucinogens: Neurochemical, Behavioral, and Clinical Perspectives. New York: Raven Press. pp. 95–142. ISBN 978-0-89004-990-7. OCLC 10324237.

[JacobShulgin1994-4] Jacob P, Shulgin AT (1994). "Structure-activity relationships of the classic hallucinogens and their analogs" (PDF). NIDA Res Monogr. 146: 74–91. PMID 8742795.

[Shulgin2003-5] Shulgin, Alexander T. (2003). "Basic Pharmacology and Effects". In Laing, Richard R. (ed.). Hallucinogens: A Forensic Drug Handbook. Forensic Drug Handbook Series. Elsevier Science. pp. 67–137. ISBN 978-0-12-433951-4. Retrieved 1 February 2025.

[GlennonYoungRosecrans1982-6] Glennon RA, Young R, Rosecrans JA (April 1982). "A comparison of the behavioral effects of DOM homologs". Pharmacol Biochem Behav. 16 (4): 557–559. doi:10.1016/0091-3057(82)90414-2. PMID 7071089.

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v t e Phenethylamines
Phenethylamines	Psychedelics: 25B-NBOMe 25C-NBOMe 25D-NBOMe 25I-NBOMe 25N-NBOMe 2C-B 2C-B-AN 2C-Bn 2C-Bu 2C-C 2C-CN 2C-CP 2C-D 2C-E 2C-EF 2C-F 2C-G 2C-G-1 2C-G-2 2C-G-3 2C-G-4 2C-G-5 2C-G-6 2C-G-N 2C-H 2C-I 2C-iBu 2C-iP 2C-N 2C-NH2 2C-O 2C-O-4 2C-P 2C-Ph 2C-SE 2C-T 2C-T-2 2C-T-3 2C-T-4 2C-T-5 2C-T-6 2C-T-7 2C-T-8 2C-T-9 2C-T-10 2C-T-11 2C-T-12 2C-T-13 2C-T-14 2C-T-15 2C-T-16 2C-T-17 2C-T-18 2C-T-19 2C-T-20 2C-T-21 2C-T-22 2C-T-22.5 2C-T-23 2C-T-24 2C-T-25 2C-T-27 2C-T-28 2C-T-30 2C-T-31 2C-T-32 2C-T-33 2C-tBu 2C-TFE 2C-TFM 2C-YN 2C-V Allylescaline DESOXY Escaline Isoproscaline Jimscaline Macromerine MEPEA Mescaline Metaescaline Methallylescaline Proscaline Psi-2C-T-4 TCB-2 Stimulants: Phenylethanolamine Hordenine Phenethylamine Phenpromethamine α-Methylphenethylamine (amphetamine) β-Methylphenethylamine m-Methylphenethylamine N-Methylphenethylamine o-Methylphenethylamine p-Methylphenethylamine Methylphenidate Entactogens: Lophophine MDPEA MDMPEA Others: Biscaline BOH Buscaline DMPEA
Amphetamines	Psychedelics: 3C-AL 3C-BZ 3C-E 3C-MAL 3C-P Aleph Beatrice Bromo-DragonFLY D-Deprenyl DMA DMCPA DMMDA DOB DOC DOEF DOET DOI DOM DON DOPR DOTFM Ganesha MMDA MMDA-2 Psi-DOM TMA TeMA ZDCM-04 Stimulants: 2-FA 2-FMA 3-FA 3-FMA Acridorex Alfetamine Amfecloral Amfepentorex Amphetamine (Dextroamphetamine, Levoamphetamine) Amphetaminil Benfluorex Benzphetamine Cathine Clobenzorex Dimethylamphetamine Ephedrine Etilamfetamine Fencamfamin Fencamine Fenethylline Fenfluramine (Dexfenfluramine, Levofenfluramine) Fenproporex Flucetorex Fludorex Formetorex Furfenorex Gepefrine 4-Hydroxyamphetamine Iofetamine Isopropylamphetamine Lefetamine Lisdexamfetamine Mefenorex Metaraminol Methamphetamine (Dextromethamphetamine, Levomethamphetamine) Methoxyphenamine MMA Morforex Norfenfluramine L-Norpseudoephedrine N,alpha-Diethylphenylethylamine Oxifentorex Oxilofrine Ortetamine PBA PCA PFA PFMA PIA PMA PMEA PMMA Phenylpropanolamine Pholedrine Prenylamine Propylamphetamine Pseudoephedrine Sibutramine Tiflorex Tranylcypromine Xylopropamine Zylofuramine Entactogens: 4-FA 4-FMA 4-MA 4-MMA 4-MTA 5-APB 5-APDB 5-EAPB 5-IT 5-MAPB 5-MAPDB 6-APB 6-APDB 6-Chloro-MDMA 6-EAPB 6-IT 6-MAPB 6-MAPDB EDA IAP 2,3-MDA 3,4-MDA (tenamfetamine) MDEA MDHMA MDMA (midomafetamine) MDOH Methamnetamine MMDMA Naphthylaminopropane TAP Others: 3,4-DCA Amiflamine DiFMDA Selegiline (also D-Deprenyl)
Phentermines	Stimulants: Chlorphentermine Cloforex Clortermine Etolorex Mephentermine Pentorex Phentermine Entactogens: MDPH MDMPH Others: Cericlamine
Cathinones	Stimulants: 3-FMC 4-MC 4-BMC 4-CMC 4-EMC 4-FMC 4-MEC 4-MeMABP 4-MPD Amfepramone Benzedrone Brephedrone Buphedrone Bupropion Cathinone Dimethylcathinone Ethcathinone Eutylone Hydroxybupropion Methcathinone Methedrone NEB N-Ethylhexedrone N-Ethylpentedrone Pentedrone Pentylone Radafaxine Entactogens: 3,4-DMMC 3-MMC Butylone Ethylone Methylone Methylenedioxycathinone Mephedrone Propylone
Phenylisobutylamines	Entactogens: 4-CAB 4-MAB Ariadne BDB Butylone EBDB Eutylone MBDB Stimulants: Phenylisobutylamine
Phenylalkylpyrrolidines	Stimulants: α-PBP α-PHP α-PPP α-PVP MDPBP MDPPP MDPV 4-MePBP 4-MePHP 4-MePPP MOPPP MOPVP MPBP MPHP MPPP Naphyrone PEP Prolintane Pyrovalerone
Catecholamines (and close relatives)	6-FNE 6-OHDA a-Me-DA a-Me-TRA Adrenochrome Ciladopa D-DOPA (Dextrodopa) Dimetofrine Dopamine Epinephrine Epinine Etilefrine Ethylnorepinephrine Fenclonine Ibopamine Isoprenaline Isoetarine L-DOPA (Levodopa) L-DOPS (Droxidopa) L-Phenylalanine L-Tyrosine m-Tyramine Metanephrine Metaraminol Metaterol Metirosine Methyldopa N,N-Dimethyldopamine Nordefrin (Levonordefrin) Norepinephrine Norfenefrine (m-Octopamine) Normetanephrine Orciprenaline p-Octopamine p-Tyramine Phenylephrine Synephrine
Miscellaneous	AL-LAD Amidephrine Arbutamine Cafedrine Denopamine Desvenlafaxine Diphenidine Dizocilpine Dobutamine Dopexamine Ephenidine Etafedrine ETH-LAD Famprofazone Fluorolintane Hexapradol IP-LAD Lysergic acid amide Lysergic acid 2-butyl amide Lysergic acid 2,4-dimethylazetidide Lysergic acid diethylamide Methoxamine Methoxphenidine MT-45 PARGY-LAD Phenibut PRO-LAD Pronethalol Salbutamol (Levosalbutamol) Solriamfetol Theodrenaline Thiamphenicol UWA-101 Venlafaxine