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DOB-CR

From Wikipedia, the free encyclopedia

Pharmaceutical compound
DOB-CR
Clinical data
Other namesDOB/CR; "DOB-Conformationally Restrained"; 5,8-Dimethoxy-7-bromo-THIQ; 7-Bromo-5,8-dimethoxy-THIQ; DOB-THIQ; DOB/THIQ
Drug classSerotonin receptor modulator
ATC code
  • None
Identifiers
  • 7-bromo-5,8-dimethoxy-1,2,3,4-tetrahydroisoquinoline
CAS Number
PubChemCID
ChemSpider
Chemical and physical data
FormulaC11H14BrNO2
Molar mass272.142 g·mol−1
3D model (JSmol)
  • COC1=CC(=C(C2=C1CCNC2)OC)Br
  • InChI=1S/C11H14BrNO2/c1-14-10-5-9(12)11(15-2)8-6-13-4-3-7(8)10/h5,13H,3-4,6H2,1-2H3
  • Key:YDHKNGFINXQAKM-UHFFFAOYSA-N

DOB-CR, orDOB/CR, , an acronym of"DOB-conformationally restrained", also known as7-bromo-5,8-dimethoxy-1,2,3,4-tetrahydroisoquinoline, is aserotonin receptor modulator of thetetrahydroisoquinoline family.[1][2][3][4] It is acyclized phenethylamine and aderivative of thepsychedelic drugs2C-B andDOB in which theside chain has beencyclized with thebenzenering to form atetrahydroisoquinoline (THIQ)ring system.[1][2][4][3]

Pharmacology

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The drug shows modestaffinity for theserotonin5-HT2A receptor.[1][3] Its affinity (Ki) for the receptor was 242 to 250 nM, which is about 6-fold lower than that of DOB.[1][3] In contrast to DOB, DOB-CR completely failed to substitute forDOM in rodentdrug discrimination tests.[1][2][3][4] In addition, behavioral disruption occurred at higher doses.[1][3] These findings suggest that DOB-CR would lackpsychedelic effects in humans.[1][2][3][4] The drug also failed to substitute fordextroamphetamine andMDMA in rodent drug discrimination tests, suggesting lack ofstimulant orentactogenic effects as well.[4] However, DOB-CR fully substituted for the structurally relatedselectiveα2-adrenergic receptorligandTDIQ (MDTHIQ or MDA-CR), albeit with about 4-fold lowerpotency than TDIQ itself.[2][4]

History

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DOB-CR was first described in thescientific literature byRichard Glennon and colleagues by 1996.[1][3]

See also

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References

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  1. ^abcdefghTrachsel 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. p. 866.ISBN 978-3-03788-700-4.OCLC 858805226. Retrieved31 January 2025.Die Tetrahydroisochinolin-THIQ)-Analoga 437 und 438 wurden als rigide Analoga von DOM (8) und DOB (2) untersucht. Sie waren jeweils deutlich weniger affin zum 5-HT Rezeptor als ihre Analoga [1821. Weiter vermochten sie in einer Diskriminationsstudie keinen Stimulus in DOM-trainierten Ratten zu erzeugen. [...] 437 Ki, h5-HT2A: 2150nM ([3H]Ketanserin) (Ki DOM: 100nM) [...] 438 Ki h5-HT2A: 242nM ([3H]Ketanserin) (Ki DOB: 41 nM)
  2. ^abcdeGlennon RA, Young R (5 August 2011). "Role of Stereochemistry in Drug Discrimination Studies".Drug Discrimination. Wiley. pp. 129–161.doi:10.1002/9781118023150.ch4.ISBN 978-0-470-43352-2. Retrieved22 May 2025.Figure 4-13. Chemical structures of TDIQ, and conformationally constrained forms of amphetamine (AMPH-CR), methamphetamine (METH-CR), and the hallucinogens DOM (DOM-CR) and DOB (DOB-CR). [...] Conformationally constrained analogs of the hallucinogens DOM and DOB (i.e., DOM-CR and DOB-CR) were not recognized by rats trained to discriminate 1.0 mg/kg of DOM from saline vehicle, but substituted in rats trained to discriminate TDIQ from vehicle (ED50 = 4.2 and 3.4 mg/kg, respectively) [15]. Interestingly, the TDIQ stimulus did not generalize to the N-methyl analog of DOM-CR [15]. Taken together with the findings obtained for METH-CR, it would appear that N-methylation is not tolerated with regard to producing TDIQ-like discriminative stimulus effects [15]. But, more importantly, and to reiterate what was stated above, it should not be assumed that "inactive" conformationally constrained rotamers are necessarily pharmacologically inactive; results depend on the similarity in the stimulus properties of the training drug and test agent.
  3. ^abcdefghMalmusi L, Dukat M, Young R, Teitler M, Darmani NA, Ahmad B, et al. (January 1996). "1,2,3,4-Tetrahydroisoquinoline analogs of phenylalkylamine stimulants and hallucinogens".Medicinal Chemistry Research.6 (6):400–411.Conformationally constrained, 1,2,3,4-tetrahydroisoquinoline (TIQ) analogs of central stimulant (e.g. amphetamine) and hallucinogenic (e.g. DOM) phenylalkylamines were prepared and evaluated to determine the contribution to activity of this conformational restriction. The amphetamine-related TIQs failed to produce locomotor stimulation in mice and did not produce amphetamine-appropriate responding in tests of stimulus generalization in (+)amphetamine-trained rats. Hallucinogen-related TIQs lacked appreciable affinity for 5-HT2A serotonin receptors and did not produce DOM-like effects in tests of stimulus generalization in DOM-trained rats. It is concluded that the phenylalkylamine conformation represented by the TIQs is not a major contributor to these actions.
  4. ^abcdefGlennon RA, Young R, Rangisetty JB (May 2002). "Further characterization of the stimulus properties of 5,6,7,8-tetrahydro-1,3-dioxolo[4,5-g]isoquinoline".Pharmacology, Biochemistry, and Behavior.72 (1–2):379–387.doi:10.1016/s0091-3057(01)00768-7.PMID 11900809.

External links

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