DMBMPP

DMBMPP
Clinical data
Other names	Juncosamine; 2-(2,5-Dimethoxy-4-bromobenzyl)-6-(2-methoxyphenyl)piperidine
Drug class	Selective serotonin 5-HT2A receptor agonist; Serotonergic psychedelic; Hallucinogen
ATC code	None;
Identifiers
	IUPAC name 2-(2,5-dimethoxy-4-bromobenzyl)-6-(2-methoxyphenyl)piperidine;
CAS Number	1391499-52-7 Y;
PubChem CID	72683323;
ChemSpider	59718542;
UNII	7H5TDL9Y6X;
Chemical and physical data
Formula	C21H26BrNO3
Molar mass	420.347 g·mol−1
3D model (JSmol)	Interactive image;
	SMILES COC(C=C(Br)C(OC)=C1)=C1C[C@@H]2CCC[C@@H](C3=C(OC)C=CC=C3)N2;
	InChI InChI=1S/C21H26BrNO3/c1-24-19-10-5-4-8-16(19)18-9-6-7-15(23-18)11-14-12-21(26-3)17(22)13-20(14)25-2/h4-5,8,10,12-13,15,18,23H,6-7,9,11H2,1-3H3/t15-,18-/m0/s1; Key:KMVGLBONODPTDY-YJBOKZPZSA-N;

Chemical compound

Pharmaceutical compound

DMBMPP, also known as juncosamine or as 2-(2,5-dimethoxy-4-bromobenzyl)-6-(2-methoxyphenyl)piperidine, is a highly selective serotonin 5-HT_2A receptor agonist and 2-benzylpiperidine analogue of the serotonergic psychedelic 25B-NBOMe which is used in scientific research.^[1]^[3]^[4]

Interactions

Pharmacology

Pharmacodynamics

The (S,S)-isomer ((2S,6S)-DMBMPP) is the most selective agonist for the human serotonin 5-HT_2A receptor yet discovered, with a affinity (K_i) of 2.5 nM at the human serotonin 5-HT_2A receptor and with 124-fold selectivity for the serotonin 5-HT_2A receptor over the structurally similar serotonin 5-HT_2C receptor.^[4]^[5] Together with 25CN-NBOH,^[6] (2S,6S)-DMBMPP is the only known 5-HT_2A agonist to exhibit this level of selectivity.^[7] In contrast to the case of the serotonin 5-HT_2A receptor, no functional data has been reported for DMBMPP at the serotonin 5-HT_2C receptor as of 2023.^[8]^[7]

Ligand	K_i ± SEM (nM)	K_i ± SEM (nM)	K_i ± SEM (nM)
	[³H] ketanserin	[³H] mesulergine	fold selectivity
	h5-HT_2A	h5-HT_2C	h5-HT_2C/h5-HT_2A
2C-B	6.0 ± 0.3	23.8 ± 2.6	9.5
25B-NBOMe	0.19 ± 0.01	4.0 ± 0.4	21
(±)-DMBMPP	5.3 ± 0.3	520 ± 22	98
(S,S)-(−)-DMBMPP	2.5 ± 0.1	310 ± 42	124
(R,R)-(+)-DMBMPP	2,100 ± 171	28,600 ± 4700	27

(S,S)-DMBMPP was assessed and found to fully substitute for the psychedelic drug LSD in rodent drug discrimination tests.^[10]^[4] As such, DMBMPP may be expected to have hallucinogenic effects in humans.^[10]^[4]

Despite its uniquely high selectivity for the serotonin 5-HT_2A receptor, it has been said that DMBMPP is not widely used as a pharmacological tool in scientific research, presumably due to its chemical synthesis being relatively inaccessible.^[7] Consequently, 25CN-NBOH, another highly selective serotonin 5-HT_2A receptor agonist, has been proposed as an alternative to DMBMPP for use in scientific research.^[7] DMBMPP and 25CN-NBOH are the two most selective serotonin 5-HT_2A receptor agonists known as of 2020.^[11]

Chemistry

DMBMPP, also known as 2-(2,5-dimethoxy-4-bromobenzyl)-6-(2-methoxyphenyl)piperidine, is a cyclized phenethylamine, 2C, and NBOMe derivative of 2C-B and 25B-NBOMe. It differs from 25B-NBOMe by incorporating the amine within a piperidine ring, making for a more conformationally restrained, rigid molecular structure than that of the open-chain 25B-NBOMe. The presence of the piperidine ring introduces two stereocenters, thus, four stereoisomers of this compound can be made.

History

DMBMPP was first described in the scientific literature by Jose Juncosa of the lab of David E. Nichols at Purdue University in 2011.^[3]^[4]

Society and culture

Legal status

DMBMPP is not an explicitly controlled substance in Canada as of 2025.^[12] However, it might be covered under phenethylamine and amphetamine blanket-ban language, although this is unclear due to its nature as a cyclized phenethylamine.^[12]

United States

DMBMPP is not an explicitly controlled substance in the United States.^[13] However, it could be considered a controlled substance under the Federal Analogue Act if intended for human consumption.

References

↑ Trachsel D, Lehmann D, Enzensperger C (2013). Phenethylamine: von der Struktur zur Funktion [Phenethylamines: From Structure to Function]. Nachtschatten-Science (in German) (1 ed.). Solothurn: Nachtschatten-Verlag. pp. 866–867. ISBN 978-3-03788-700-4. OCLC 858805226. Retrieved 31 January 2025.
1 2 Juncosa JI (2011-05-07). Organic synthesis combined with molecular modeling: A powerful approach to map the functional topography of dopamine and serotonin receptors (Ph.D. thesis). Purdue University.
1 2 3 4 5 Juncosa JI, Hansen M, Bonner LA, Cueva JP, Maglathlin R, McCorvy JD, et al. (January 2013). "Extensive rigid analogue design maps the binding conformation of potent N-benzylphenethylamine 5-HT2A serotonin receptor agonist ligands". ACS Chemical Neuroscience. 4 (1): 96–109. doi:10.1021/cn3000668. PMC 3547484. PMID 23336049.
↑ Duan W, Cao D, Wang S, Cheng J (January 2024). "Serotonin 2A Receptor (5-HT2AR) Agonists: Psychedelics and Non-Hallucinogenic Analogues as Emerging Antidepressants". Chemical Reviews. 124 (1): 124–163. doi:10.1021/acs.chemrev.3c00375. PMID 38033123. Structural rigidification of the ethyl chain has also led to the discovery of DMBMPP (158, Figure 13B),193 which displayed high affinity for the h5-HT2AR (Ki = 2.5 nM, [3 H]- mesulergine), more potent than that of its parental compound DOB. Notably, DMBMPP had a significant 124-fold 5- HT2AR/5-HT2CR selectivity, being one of the most selective 5-HT2AR agonists reported. DMBMPP exhibited potent partial agonist activity at the 5-HT2AR in the PI hydrolysis assay (EC50 = 74 nM, Emax = 73%).
↑ Hansen M, Phonekeo K, Paine JS, Leth-Petersen S, Begtrup M, Bräuner-Osborne H, et al. (March 2014). "Synthesis and structure-activity relationships of N-benzyl phenethylamines as 5-HT2A/2C agonists". ACS Chemical Neuroscience. 5 (3): 243–249. doi:10.1021/cn400216u. PMC 3963123. PMID 24397362.
1 2 3 4 Märcher Rørsted E, Jensen AA, Kristensen JL (November 2021). "25CN-NBOH: A Selective Agonist for in vitro and in vivo Investigations of the Serotonin 2A Receptor". ChemMedChem. 16 (21): 3263–3270. doi:10.1002/cmdc.202100395. PMID 34288515. In the quest for more sub-type selective tool agonists for the 5- HT2AR medicinal chemistry exploration has yielded several subtype selective scaffolds most notably the Benzylpiperidines and the N-Benzylphenethylamines. 2-(2,5-dimethoxy-4- bromobenzyl)-6-(2-methoxyphenyl)piperidine (DMBMPP, see Scheme 1.) represents the former and is one the most selective agonists reported to date, with high binding affinity to 5-HT2AR (Ki = 2.5 nM) and 124-fold selectivity towards the 5-HT2CR, although functional data is yet to be reported. [28] DMBMPP is not widely used as a pharmacological tool, presumably due to its relative inaccessibility from a synthetic standpoint.
↑ Marcher-Rørsted E, Nykodemová J, Harpsøe K, Jensen AA, Kristensen JL (March 2023). "Introducing Conformational Restraints on 25CN-NBOH: A Selective 5-HT2A Receptor Agonist". ACS Medicinal Chemistry Letters. 14 (3): 319–325. doi:10.1021/acsmedchemlett.3c00014. PMC 10009789. PMID 36923922. In order to probe the optimal spacial orientation of the highly flexible benzylethylamine chain of the NBOMe scaffold, Nichols in 2013 reported conformationally restricted NBOMe analogs and found 2-(2,5-dimethoxy-4-bromobenzyl)-6-(2- methoxyphenyl)piperidine (DMPMBB, 2, Scheme 1) to be ∼100-fold more selective for 5-HT2AR over 5-HT2CR in a binding assay.11 Moreover, 2 displayed an EC50 value of 74 nM and an Rmax value of 73% at 5-HT2AR in a phosphoinositol hydrolysis assay,11 whereas no functional data for 2 at 5- HT2CR has been reported to date.
Nichols DE (2018). "Chemistry and Structure-Activity Relationships of Psychedelics". . : 1–43. doi:10.1007/7854_2017_475. ISBN 978-3-662-55878-2. PMID 28401524. In an attempt to identify the active binding conformation of the N-benzylphenethylamines, a series of nine of conformationally constrained analogues of 76 was prepared (Juncosa et al. 2013). The most potent of these analogues was S,S enantiomer 77. This compound, as the racemate, had an EC50 of 74 nM and an Emax of 73% for PI hydrolysis through activation of the human 5-HT2A receptor. In drug discrimination experiments in rats trained to discriminate LSD from saline, 77 had an ED50 of 0.41 μmol/kg. Furthermore, (S,S)-(−)-77 had 124-fold selectivity for the 5-HT2A receptor versus the 5-HT2C receptor, using antagonist radioligands to measure affinity. [...]
↑
1 2 "Controlled Drugs and Substances Act". Department of Justice Canada. 5 December 2025. Retrieved 20 January 2026.
↑ Orange Book: List of Controlled Substances and Regulated Chemicals (January 2026) (PDF), United States: U.S. Department of Justice: Drug Enforcement Administration (DEA): Diversion Control Division, January 2026

External links

DMBMPP - Isomer Design

[Trachsel_2013-1] Trachsel D, Lehmann D, Enzensperger C (2013). Phenethylamine: von der Struktur zur Funktion [Phenethylamines: From Structure to Function]. Nachtschatten-Science (in German) (1 ed.). Solothurn: Nachtschatten-Verlag. pp. 866–867. ISBN 978-3-03788-700-4. OCLC 858805226. Retrieved 31 January 2025.

[Juncosa_2011-3] 1 2 Juncosa JI (2011-05-07). Organic synthesis combined with molecular modeling: A powerful approach to map the functional topography of dopamine and serotonin receptors (Ph.D. thesis). Purdue University.

[Juncosa_2013-4] 1 2 3 4 5 Juncosa JI, Hansen M, Bonner LA, Cueva JP, Maglathlin R, McCorvy JD, et al. (January 2013). "Extensive rigid analogue design maps the binding conformation of potent N-benzylphenethylamine 5-HT2A serotonin receptor agonist ligands". ACS Chemical Neuroscience. 4 (1): 96–109. doi:10.1021/cn3000668. PMC 3547484. PMID 23336049.

[Duan_2024-5] Duan W, Cao D, Wang S, Cheng J (January 2024). "Serotonin 2A Receptor (5-HT2AR) Agonists: Psychedelics and Non-Hallucinogenic Analogues as Emerging Antidepressants". Chemical Reviews. 124 (1): 124–163. doi:10.1021/acs.chemrev.3c00375. PMID 38033123. Structural rigidification of the ethyl chain has also led to the discovery of DMBMPP (158, Figure 13B),193 which displayed high affinity for the h5-HT2AR (Ki = 2.5 nM, [3 H]- mesulergine), more potent than that of its parental compound DOB. Notably, DMBMPP had a significant 124-fold 5- HT2AR/5-HT2CR selectivity, being one of the most selective 5-HT2AR agonists reported. DMBMPP exhibited potent partial agonist activity at the 5-HT2AR in the PI hydrolysis assay (EC50 = 74 nM, Emax = 73%).

[6] Hansen M, Phonekeo K, Paine JS, Leth-Petersen S, Begtrup M, Bräuner-Osborne H, et al. (March 2014). "Synthesis and structure-activity relationships of N-benzyl phenethylamines as 5-HT2A/2C agonists". ACS Chemical Neuroscience. 5 (3): 243–249. doi:10.1021/cn400216u. PMC 3963123. PMID 24397362.

[Marcher_Rrsted_2021-7] 1 2 3 4 Märcher Rørsted E, Jensen AA, Kristensen JL (November 2021). "25CN-NBOH: A Selective Agonist for in vitro and in vivo Investigations of the Serotonin 2A Receptor". ChemMedChem. 16 (21): 3263–3270. doi:10.1002/cmdc.202100395. PMID 34288515. In the quest for more sub-type selective tool agonists for the 5- HT2AR medicinal chemistry exploration has yielded several subtype selective scaffolds most notably the Benzylpiperidines and the N-Benzylphenethylamines. 2-(2,5-dimethoxy-4- bromobenzyl)-6-(2-methoxyphenyl)piperidine (DMBMPP, see Scheme 1.) represents the former and is one the most selective agonists reported to date, with high binding affinity to 5-HT2AR (Ki = 2.5 nM) and 124-fold selectivity towards the 5-HT2CR, although functional data is yet to be reported. [28] DMBMPP is not widely used as a pharmacological tool, presumably due to its relative inaccessibility from a synthetic standpoint.

[MarcherRrsted_2023-8] Marcher-Rørsted E, Nykodemová J, Harpsøe K, Jensen AA, Kristensen JL (March 2023). "Introducing Conformational Restraints on 25CN-NBOH: A Selective 5-HT2A Receptor Agonist". ACS Medicinal Chemistry Letters. 14 (3): 319–325. doi:10.1021/acsmedchemlett.3c00014. PMC 10009789. PMID 36923922. In order to probe the optimal spacial orientation of the highly flexible benzylethylamine chain of the NBOMe scaffold, Nichols in 2013 reported conformationally restricted NBOMe analogs and found 2-(2,5-dimethoxy-4-bromobenzyl)-6-(2- methoxyphenyl)piperidine (DMPMBB, 2, Scheme 1) to be ∼100-fold more selective for 5-HT2AR over 5-HT2CR in a binding assay.11 Moreover, 2 displayed an EC50 value of 74 nM and an Rmax value of 73% at 5-HT2AR in a phosphoinositol hydrolysis assay,11 whereas no functional data for 2 at 5- HT2CR has been reported to date.

[Nichols_2018-10] Nichols DE (2018). "Chemistry and Structure-Activity Relationships of Psychedelics". . : 1–43. doi:10.1007/7854_2017_475. ISBN 978-3-662-55878-2. PMID 28401524. In an attempt to identify the active binding conformation of the N-benzylphenethylamines, a series of nine of conformationally constrained analogues of 76 was prepared (Juncosa et al. 2013). The most potent of these analogues was S,S enantiomer 77. This compound, as the racemate, had an EC50 of 74 nM and an Emax of 73% for PI hydrolysis through activation of the human 5-HT2A receptor. In drug discrimination experiments in rats trained to discriminate LSD from saline, 77 had an ED50 of 0.41 μmol/kg. Furthermore, (S,S)-(−)-77 had 124-fold selectivity for the 5-HT2A receptor versus the 5-HT2C receptor, using antagonist radioligands to measure affinity. [...]

[Poulie_2020-11] ↑

[CDSA2025-12] 1 2 "Controlled Drugs and Substances Act". Department of Justice Canada. 5 December 2025. Retrieved 20 January 2026.

[OrangeBook2026-13] Orange Book: List of Controlled Substances and Regulated Chemicals (January 2026) (PDF), United States: U.S. Department of Justice: Drug Enforcement Administration (DEA): Diversion Control Division, January 2026

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