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1-Methyltryptamine

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Pharmaceutical compound
1-Methyltryptamine
Clinical data
Other names1-Methyl-T; 1-MT; 1-Me-T; 1-Me-tryptamine; PAL-637; PAL637
Drug classSerotonin receptor agonist;Serotonin releasing agent
ATC code
  • None
Identifiers
  • 2-(1-methylindol-3-yl)ethanamine
CAS Number
PubChemCID
ChemSpider
ChEBI
ChEMBL
CompTox Dashboard(EPA)
ECHA InfoCard100.028.525Edit this at Wikidata
Chemical and physical data
FormulaC11H14N2
Molar mass174.247 g·mol−1
3D model (JSmol)
  • CN1C=C(C2=CC=CC=C21)CCN
  • InChI=1S/C11H14N2/c1-13-8-9(6-7-12)10-4-2-3-5-11(10)13/h2-5,8H,6-7,12H2,1H3
  • Key:CAAGZPJPCKMFBD-UHFFFAOYSA-N

1-Methyltryptamine (1-methyl-T,1-MT or1-Me-T; code namePAL-637) is aserotonin receptor agonist andmonoamine releasing agent of thetryptamine family.[1][2][3] It is the 1-methylderivative oftryptamine (T; PAL-235).[1][2][3]

The drug is known to act as aserotonin5-HT2A receptoragonist (Ki = 473 nM;EC50Tooltip half-maximal effective concentration = 209–4,560 nM;EmaxTooltip maximal efficacy = 55–99%), as aserotonin releasing agent (EC50 = 53.1 nM), and to be inactive in inducing the release ofnorepinephrine anddopamine (EC50 = >10,000 nM).[1] Its activities at otherserotonin receptors were not reported.[1][3] 1-Methyltryptamine shows dramatically reducedaffinity andactivationalpotency as well as reducedefficacy at the serotonin 5-HT2A receptor compared to tryptamine (which showed Ki = 13.1 nM;EC50 = 7.36–99 nM;Emax = 101–104%).[3][1] It also shows slightly reduced potency as a serotonin releasing agent and abolished activity as a releaser of norepinephrine and dopamine relative to tryptamine (which hadEC50 = 32.6 nM, 716 nM, and 164 nM, respectively).[1]

Analogues of 1-methyltryptamine, like1-methylserotonin and1-iPr-5-MeO-T, have been studied.[4] Similarly to the case of 1-methyltryptamine contrasted with tryptamine, they show dramatically reduced affinities and activational potencies at the human serotonin 5-HT2A receptor relative to their 1-unsubstituted counterparts (serotonin and5-methoxytryptamine, respectively).[4]

See also

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References

[edit]
  1. ^abcdefBlough BE, Landavazo A, Partilla JS, Decker AM, Page KM, Baumann MH, et al. (October 2014)."Alpha-ethyltryptamines as dual dopamine-serotonin releasers".Bioorganic & Medicinal Chemistry Letters.24 (19):4754–4758.doi:10.1016/j.bmcl.2014.07.062.PMC 4211607.PMID 25193229.
  2. ^abDuan 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.In addition to natural tryptamine psychedelics, numerous synthetic analogues have been reported. Compounds in Figure 5A show that, compared to the prototype tryptamine (9, Ki = 29.7 nM at h5-HT2AR, [125I]-DOI), methylation of the indole NH group slightly increases the binding affinity (1-Metryptamine, 10, Ki = 11.7 nM).136 The introduction of a methoxy group at position 5 also enhances binding affinity (11, 5-MeO-T, Ki = 1.34 nM), but a further alkylation of the indole NH with an isopropyl group almost abolished the binding affinity (12, 1-iPr-5-MeO-T, Ki = 494 nM).136
  3. ^abcdMcCorvy JD (16 January 2013).Mapping the binding site of the 5-HT2A receptor using mutagenesis and ligand libraries: Insights into the molecular actions of psychedelics (Ph.D. thesis). Purdue University. Retrieved12 March 2025 – via Purdue e-Pubs.
  4. ^abBraden MR, Nichols DE (November 2007)."Assessment of the roles of serines 5.43(239) and 5.46(242) for binding and potency of agonist ligands at the human serotonin 5-HT2A receptor".Molecular Pharmacology.72 (5):1200–1209.doi:10.1124/mol.107.039255.PMID 17715398.

External links

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5-HT1A
5-HT1B
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5-HT1E
5-HT1F
5-HT2
5-HT2A
5-HT2B
5-HT2C
5-HT37
5-HT3
5-HT4
5-HT5A
5-HT6
5-HT7
DRAsTooltip Dopamine releasing agents
NRAsTooltip Norepinephrine releasing agents
SRAsTooltip Serotonin releasing agents
Others
Tryptamines
4-Hydroxytryptamines
andesters/ethers
5-Hydroxy- and
5-methoxytryptamines
N-Acetyltryptamines
α-Alkyltryptamines
Cyclized tryptamines
Isotryptamines
Related compounds
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