Chemistry:RTI-51
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| Formula | C16H20BrNO2 |
| Molar mass | 338.245 g·mol−1 |
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(–)-2β-Carbomethoxy-3β-(4-bromophenyl)tropane (RTI-4229-51, bromopane) is a semi-synthetic alkaloid in the phenyltropane group of psychostimulant compounds. First publicized in the 1990s, it has not been used enough to have gained a fully established profile. RTI-51 can be expected to have properties lying somewhere in between RTI-31 and RTI-55. It has a ratio of monoamine reuptake inhibition of dopamine > serotonin > norepinephrine (1.8:10.6:37.4 nM respectively) which is an unusual balance of effects not produced by other commonly used compounds (although RTI-121 is similar, but more DAT selective).[1] It has been used in its 76Br radiolabelled form to map the distribution of dopamine transporters in the brain.[2]
Modern research seems to confirm the above hypothesis.[3] However, earlier work produced more scattered results.[4] Based upon what is obvious from the table, RTI-31, RTI-51, and RTI-55 are all similarly potent TRIs.[5][6]
| Compound | [3H]CFT | [3H]DA | [3H]Nisoxetine | [3H]NE | [3H]Paroxetine | [3H]5-HT |
|---|---|---|---|---|---|---|
| Cocaine[8] | 89.1 | 275 cf. 241 | 3300 (1990) | 119 cf. 161 | 1050 (45) | 177 cf. 112 |
| WIN 35,065-2 | 23 | 49.8 | 920 (550) | 37.2 | 1960 (178) | 173 |
| WIN 35,428 | 13.9 | 23.0 | 835 (503) | 38.6 | 692 (63) | 101 |
| RTI-31 | 1.1 | 3.68 | 37 (22) | 5.86 | 44.5 (4.0) | 5.00 |
| RTI-113[9] | 1.98 | 5.25 | 2,926 | 242 | 2,340 | 391 |
| RTI-51 | 1.7 | ? | 37.4 (23) | ? | 10.6 (0.96) | ? |
| RTI-55 | 1.3 | 1.96 | 36 (22) | 7.51 | 4.21 (0.38) | 1.74 |
| RTI-32 | 1.7 | 7.02 | 60 (36) | 8.42 | 240 (23) | 19.4 |
Data in above table is from rats brains (1995). More recent work has advocated using cloned human transporters.
See also
References
- ↑ "Chemistry, design, and structure-activity relationship of cocaine antagonists". Chemical Reviews 100 (3): 925–1024. March 2000. doi:10.1021/cr9700538. PMID 11749256.
- ↑ Loch C, Müller L, Ottaviani M, Halldin C, Farde L, Maziere B. Synthesis of 2β-carbomethoxy-3β-(4-[76Br]bromophenyl)tropane ([76Br]β-CBT), a PET tracer for in vivo imaging of the dopamine uptake sites. Journal of labelled compounds & radiopharmaceuticals. 1995; 36(4):385-392.
- ↑ "A reduced rate of in vivo dopamine transporter binding is associated with lower relative reinforcing efficacy of stimulants". Neuropsychopharmacology 31 (2): 351–62. February 2006. doi:10.1038/sj.npp.1300795. PMID 15957006.
- ↑ "Rate of binding of various inhibitors at the dopamine transporter in vivo". Psychopharmacology 119 (4): 376–84. June 1995. doi:10.1007/BF02245852. PMID 7480516. https://zenodo.org/record/1232524.
- ↑ "Locomotor stimulant effects of novel phenyltropanes in the mouse". Drug and Alcohol Dependence 65 (1): 25–36. December 2001. doi:10.1016/S0376-8716(01)00144-2. PMID 11714587.
- ↑ "Anticocaine catalytic antibodies have no affinity for RTI compounds: implications for treatment". Synapse 41 (2): 176–8. August 2001. doi:10.1002/syn.1072. PMID 11400184.
- ↑ "Cocaine and 3 beta-(4'-substituted phenyl)tropane-2 beta-carboxylic acid ester and amide analogues. New high-affinity and selective compounds for the dopamine transporter". Journal of Medicinal Chemistry 38 (2): 379–88. January 1995. doi:10.1021/jm00002a020. PMID 7830281.
- ↑ "Mixed cocaine agonist/antagonist properties of (+)-methyl 4beta-(4-chlorophenyl)-1-methylpiperidine-3alpha-carboxylate, a piperidine-based analog of cocaine". The Journal of Pharmacology and Experimental Therapeutics 305 (1): 143–50. April 2003. doi:10.1124/jpet.102.046318. PMID 12649362.
- ↑ "Pharmacological characterization of nicotine's interaction with cocaine and cocaine analogs". The Journal of Pharmacology and Experimental Therapeutics 289 (3): 1229–36. June 1999. PMID 10336510.
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