DOx

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File:2,5-DMA.svg
2,5-Dimethoxyamphetamine (2,5-DMA), the base chemical structure of the DOx family.

4-Substituted-2,5-dimethoxyamphetamines (DOx) is a chemical class of substituted amphetamine derivatives featuring methoxy groups at the 2- and 5- positions of the phenyl ring, and a substituent such as alkyl or halogen at the 4- position of the phenyl ring.[1][2] They are 4-substituted derivatives of 2,5-dimethoxyamphetamine (2,5-DMA, DOH) and are structurally related to the naturally occurring phenethylamine psychedelic mescaline.

The most well-known DOx drugs are DOM, DOI, DOB, DOET, and DOC.[3] DOI is widely used in scientific research.[2][4] DOM has been used as a recreational drug, while DOET was an experimental pharmaceutical drug.[5]

Most compounds of this class are potent and long-lasting psychedelic drugs, and act as selective 5-HT2A, 5-HT2B, and 5-HT2C receptor agonists.[6][7] A few bulkier derivatives such as DOAM have similarly high affinity for 5-HT2 receptors but have reduced activational efficacy and do not produce psychedelic effects.[2][6]

DOI has been found to have extraordinarily potent anti-inflammatory effects.[8][9][10] These properties are not shared by all other related drugs and appear to be mediated by functionally selective serotonin 5-HT2A receptor activation.[9][11] The anti-inflammatory effects of DOI and related drugs may have medical applications.[8][9]

Use

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Side effects

DOx drugs like DOM have been associated with certain side effects that have not occurred to the same extent with other psychedelics like LSD.[5] Examples of such side effects include physical symptoms like sweating, tremors, and large increases in heart rate.[5]

Interactions

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Pharmacology

Pharmacodynamics

Actions

DOx drugs at the human 5-HT2 receptors
Compound Affinity (Ki, nM)
5-HT2A 5-HT2B 5-HT2C
2,5-DMATooltip 2,5-Dimethoxyamphetamine 211–2,502 1,039 104–>5,070
DOMTooltip 2,5-Dimethoxy-4-methylamphetamine 88–507.4 11.7 404–3,980
DOETTooltip 2,5-Dimethoxy-4-ethylamphetamine 12–100 28.8 107.2–108
DOPRTooltip 2,5-Dimethoxy-4-n-propylamphetamine 0.9 54.4 1.1
DOBUTooltip 2,5-Dimethoxy-4-n-butylamphetamine 5.4 ND 60
DOTBTooltip 2,5-Dimethoxy-4-t-butylamphetamine 3.7 24.6 2.2
DOAMTooltip 2,5-Dimethoxy-4-amylamphetamine 3.5 ND 75
DOHxTooltip 2,5-Dimethoxy-4-n-hexylamphetamine 0.1 30.3 0.7
DOFTooltip 2,5-Dimethoxy-4-fluoroamphetamine 41.7–378 227 28.7–792
DOCTooltip 2,5-Dimethoxy-4-chloroamphetamine 1.4–12 31.8 2.0–143
DOBTooltip 2,5-Dimethoxy-4-bromoamphetamine 0.6–41 26.9 1.3–78
DOITooltip 2,5-Dimethoxy-4-iodoamphetamine 0.7–165.4 20.0–335.9 2.4–48
TMA-2Tooltip 2,4,5-Trimethoxyamphetamine 57.9–584.2 154.4–307 87.7–4,062
MEMTooltip 2,5-Dimethoxy-4-ethoxyamphetamine 73.0–3,948 64.5–763 124–>10,000
Aleph-2Tooltip 2,5-Dimethoxy-4-ethylthioamphetamine 60.4 1.6 50.3
DOAcTooltip 2,5-Dimethoxy-4-acetylamphetamine 80.5 313 91.3
DONTooltip 2,5-Dimethoxy-4-nitroamphetamine 5.5 166 22.4
DOCNTooltip 2,5-Dimethoxy-4-cyanoamphetamine 45.7 774 1,011
DOBZTooltip 2,5-Dimethoxy-4-benzylamphetamine 0.4 35.0 1.0
M-154 94.2 341 68.1
D-367 88.5 521 514
QDOB 2,155 >10,000 6,298
Notes: The smaller the value, the more avidly the drug binds to the site. Refs: [24][25][7][6][26][27]

The DOx drugs act as agonists of the serotonin 5-HT2 receptors, including of the serotonin 5-HT2A, 5-HT2B, and 5-HT2C receptors.[6][28][7][2][3][29] Their psychedelic effects are thought to be mediated specifically by activation of the serotonin 5-HT2A receptor.[28][2]

In contrast to other amphetamines, DOx drugs like DOC, DOET, and DOM are inactive as monoamine releasing agents and reuptake inhibitors.[30][31][6] Some of the DOx drugs, including DOB, DOET, DOI, and DOM, are agonists of the rat, rhesus monkey, and/or human trace amine-associated receptor 1 (TAAR1) with varying potencies.[32][33]

Effects

In contrast to amphetamines like (–)-cathinone, but similarly to mescaline, DOM has shown no stimulant-like or reinforcing effects in rhesus monkeys.[34][35][36][37] Conversely however, DOC has shown reinforcing effects, including conditioned place preference (CPP) and self-administration, in rodents similarly to methamphetamine.[38] This is analogous to other findings in which various 2C and NBOMe drugs have been found to produce brain dopaminergic elevations and reinforcing effects in rodents.[39][40][41][42][43][44][45]

Pharmacokinetics

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History

DOM was the first psychedelic of the DOx series to be discovered.[4] It was first synthesized by Alexander Shulgin at Dow Chemical Company in 1963, who had had his first psychedelic experience, with mescaline (3,4,5-trimethoxyphenethylamine), in 1960.[4][5][16] Shulgin personally tried DOM on January 4, 1964 and discovered its psychedelic effects.[46][4][5][16] 2,4,5-Trimethoxyamphetamine (TMA-2; "DOMeO") had been synthesized by Bruckner in 1933, but its psychedelic effects were not described until Shulgin tried the compound and reported its effects in the scientific literature in 1964.[22][47][48] Prior to this, 3,4,5-trimethoxyamphetamine (TMA; α-methylmescaline) had been synthesized by Hey in 1947, being found by him to produce euphoria, and was described by Peretz and colleagues in 1955 as clearly producing psychedelic effects.[22][49][50][51]

Following his discovery of DOM, Shulgin developed DOET and found that at low doses it was a remarkable "psychic energizer" without producing psychedelic effects at these doses.[5] Dow Chemical Company decided to move forward with clinical trials of DOET as a potential pharmaceutical drug for such purposes.[5] Shulgin and Dow Chemical Company filed a patent for DOET in 1966, although it was not published until 1970.[5][4][52] Dow Chemical Company tasked Solomon H. Snyder at Johns Hopkins University with clinically studying DOET.[5]

In April 1967, following the banning of LSD in California in 1966, DOM emerged as a street drug and legal LSD alternative with the name "STP" (allegedly short for "Serenity, Tranquility, and Peace") in the Haight-Ashbury district in San Francisco.[5][53] This occurred due to DOM being publicly distributed for free in the form of high-dose tablets by LSD distributor Owsley Stanley, who had personally learned of DOM from Shulgin.[5][53] It is unclear why Shulgin provided information about DOM to Stanley, since doing so had the potential to risk Shulgin's professional career and the DOET clinical studies.[5][53] One possibility is that Dow Chemical Company was not further looking into DOM and Shulgin thought that it was a promising drug that would otherwise be forgotten.[5] In any case, street use of DOM was short-lived because the tablets caused a public health crisis due to them often producing very long durations (up to 3–4Script error: No such module "String".days), intense experiences, worrying physical side effects, and hospitalizations.[5] DOM was first reported on in the media and scientific literature in 1967 as a result of the crisis.[5][54][55] DOM became illegal in the United States in 1968.[5]

Dow Chemical Company terminated its clinical research program on DOET due to the DOM public health crisis.[5] DOET was subsequently first described in the literature by Snyder and colleagues in 1968.[55] Snyder continued to be interested in DOET as a potential medicine, but it was never further developed.[55] Snyder also described 2,5-dimethoxyamphetamine (2,5-DMA), which had been synthesized and tested by Shulgin, in the literature in 1968.[56] DOM and DOET were further described in the scientific literature by Shulgin in 1969.[57][4][5] In addition, Shulgin discussed DOM, DOET, TMA-2, and 2,5-DMA in a book chapter on hallucinogens published in 1970.[58]

The earlier DOx drugs like DOM and DOET were subsequently followed by DOB, which was developed by Shulgin and colleagues like Claudio Naranjo, in 1971,[4][59] and by DOI, DOC, and a few other analogues, which were developed by another research group, in 1973.[4][60] After this, numerous other DOx drugs were synthesized and characterized, both by Shulgin and other scientists.[22][13][15][12][16][61][2]

Following its discovery, DOI has become widely used in scientific research in the study of the serotonin 5-HT2 receptors.[4][2]

List of DOx drugs

The DOx family includes the following members:

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Related compounds

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A number of additional compounds are known with alternative substitutions:

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See also

References

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External links

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