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| synonyms = <small>DL</small>-Phenylalaninol; Phenylmethylethanolamine; Benzylethanolamine; <small>DL</small>-Phenylglycinol; PAL-329; PAL329 | synonyms = <small>DL</small>-Phenylalaninol; Phenylmethylethanolamine; Benzylethanolamine; <small>DL</small>-Phenylglycinol; α-(Hydroxymethyl)phenethylamine; PAL-329; PAL329


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'''Phenylalaninol''' (code name '''PAL-329'''), or '''<small>DL</small>-phenylalaninol''', also known as '''phenylmethylethanolamine''', is a ] and ] (MRA) of the ] family.<ref name="KohutJacobsRothman2017">{{cite journal | vauthors = Kohut SJ, Jacobs DS, Rothman RB, Partilla JS, Bergman J, Blough BE | title = Cocaine-like discriminative stimulus effects of "norepinephrine-preferring" monoamine releasers: time course and interaction studies in rhesus monkeys | journal = Psychopharmacology (Berl) | volume = 234 | issue = 23-24 | pages = 3455–3465 | date = December 2017 | pmid = 28889212 | pmc = 5747253 | doi = 10.1007/s00213-017-4731-5 | url = }}</ref><ref name="deMouraSherwoodPrisinzano2018">{{cite journal | last=de Moura | first=Fernando Barreto | last2=Sherwood | first2=Alexander | last3=Prisinzano | first3=Thomas Edward | last4=Kohut | first4=Stephen John | last5=Bergman | first5=Jack | title=Intravenous Self‐Administration of Synthetic Cathinones in Rhesus Monkeys | journal=The FASEB Journal | volume=32 | issue=S1 | date=2018 | issn=0892-6638 | doi=10.1096/fasebj.2018.32.1_supplement.550.3 | page=}}</ref> It is related to the ] and ] ] and to the ] and stimulant ] (phenylethylamine).<ref name="PubChem" /> '''Phenylalaninol''' (code name '''PAL-329'''), or '''<small>DL</small>-phenylalaninol''', also known as '''phenylmethylethanolamine''' or as '''α-(hydroxymethyl)phenethylamine''', is a ] and ] (MRA) of the ] family.<ref name="KohutJacobsRothman2017">{{cite journal | vauthors = Kohut SJ, Jacobs DS, Rothman RB, Partilla JS, Bergman J, Blough BE | title = Cocaine-like discriminative stimulus effects of "norepinephrine-preferring" monoamine releasers: time course and interaction studies in rhesus monkeys | journal = Psychopharmacology (Berl) | volume = 234 | issue = 23–24 | pages = 3455–3465 | date = December 2017 | pmid = 28889212 | pmc = 5747253 | doi = 10.1007/s00213-017-4731-5 | url = }}</ref><ref name="deMouraSherwoodPrisinzano2018">{{cite journal | last1=de Moura | first1=Fernando Barreto | last2=Sherwood | first2=Alexander | last3=Prisinzano | first3=Thomas Edward | last4=Kohut | first4=Stephen John | last5=Bergman | first5=Jack | title=Intravenous Self-Administration of Synthetic Cathinones in Rhesus Monkeys | journal=The FASEB Journal | volume=32 | issue=S1 | date=2018 | issn=0892-6638 | doi=10.1096/fasebj.2018.32.1_supplement.550.3 | page=| doi-access=free }}</ref> It is related to the ] ] and to the phenethylamine psychostimulants ] (phenylethylamine) and ] (α-methylphenethylamine).<ref name="PubChem" />


<small>D</small>-Phenylalanine is a psychostimulant and ]-preferring ] (NDRA).<ref name="KohutJacobsRothman2017" /><ref name="deMouraSherwoodPrisinzano2018" /> The {{Abbrlink|EC<sub>50</sub>|half-maximal effective concentration}} values of <small>D</small>-phenylalanine for monoamine release are 106{{nbsp}}nM for norepinephrine, 1,355{{nbsp}}nM for ], and >10,000{{nbsp}}nM for ] in rat brain ]s.<ref name="KohutJacobsRothman2017" /> Its ] in inducing norepinephrine release is 13-fold higher than in inducing dopamine release.<ref name="KohutJacobsRothman2017" /> Similarly to other ]s like ], the drug shows ]-like effects and ] properties in ]s.<ref name="KohutJacobsRothman2017" /><ref name="deMouraSherwoodPrisinzano2018" /> The much greater potency of <small>D</small>-phenylalanine in inducing norepinephrine over inducing dopamine release does not appear to interfere with its dopamine release-mediated reinforcing effects.<ref name="KohutJacobsRothman2017" /><ref name="deMouraSherwoodPrisinzano2018" /> <small>D</small>-Phenylalanine is a psychostimulant and ] ] (NRA) or ]-preferring ] (NDRA).<ref name="KohutJacobsRothman2017" /><ref name="deMouraSherwoodPrisinzano2018" /> The {{Abbrlink|EC<sub>50</sub>|half-maximal effective concentration}} values of <small>D</small>-phenylalanine for monoamine release are 106{{nbsp}}nM for norepinephrine, 1,355{{nbsp}}nM for ], and >10,000{{nbsp}}nM for ] in rat brain ]s.<ref name="KohutJacobsRothman2017" /> It is dramatically less ] as an MRA than phenethylamine or amphetamine.<ref name="KohutJacobsRothman2017" /><ref name="Blough2008">{{cite book | vauthors = Blough B | chapter = Dopamine-releasing agents | veditors = Trudell ML, Izenwasser S | title = Dopamine Transporters: Chemistry, Biology and Pharmacology | pages = 305–320 | date = July 2008 | isbn = 978-0-470-11790-3 | oclc = 181862653 | ol = OL18589888W | publisher = Wiley | location = Hoboken | doi = | url = https://books.google.com/books?id=QCagLAAACAAJ | chapter-url = https://bitnest.netfirms.com/external/Books/Dopamine-releasing-agents_c11.pdf }}</ref> The potency of <small>D</small>-phenylalaninol in inducing norepinephrine release is 13-fold higher than its potency in inducing dopamine release.<ref name="KohutJacobsRothman2017" /> Similarly to other ]s like amphetamine, the drug shows ]-like effects and ] properties in ]s.<ref name="KohutJacobsRothman2017" /><ref name="deMouraSherwoodPrisinzano2018" /> The much greater potency of <small>D</small>-phenylalanine in inducing norepinephrine over inducing dopamine release does not appear to interfere with its dopamine release-mediated reinforcing effects.<ref name="KohutJacobsRothman2017" /><ref name="deMouraSherwoodPrisinzano2018" />


The clinically used stimulant, ], and ] (NDRI) ] (brand name Sunosi; ''O''-carbamoyl-<small>D</small>-phenylalaninol) is a ] of phenylalaninol with a ] ] at the ] of the molecule.<ref name="YangGao2019">{{cite journal | vauthors = Yang J, Gao J | title = Solriamfetol for the treatment of excessive daytime sleepiness associated with narcolepsy | journal = Expert Rev Clin Pharmacol | volume = 12 | issue = 8 | pages = 723–728 | date = August 2019 | pmid = 31215815 | doi = 10.1080/17512433.2019.1632705 | url = }}</ref> Phenylalaninol is a known ] in ] of solriamfetol.<ref name="FejősTóthVárnai2021">{{cite journal | vauthors = Fejős I, Tóth G, Várnai B, Szabó ZI, Köteles I, Malanga M, Béni S | title = Enantioseparation of solriamfetol and its major impurity phenylalaninol by capillary electrophoresis using sulfated gamma cyclodextrin | journal = Electrophoresis | volume = 42 | issue = 17-18 | pages = 1818–1825 | date = September 2021 | pmid = 34109644 | doi = 10.1002/elps.202100076 | url = }}</ref> The clinically used stimulant, ], and well-balanced ] (NDRI) ] (brand name Sunosi; ''O''-carbamoyl-<small>D</small>-phenylalaninol) is a ] of phenylalaninol with a ] ] at the ] of the molecule.<ref name="YangGao2019">{{cite journal | vauthors = Yang J, Gao J | title = Solriamfetol for the treatment of excessive daytime sleepiness associated with narcolepsy | journal = Expert Rev Clin Pharmacol | volume = 12 | issue = 8 | pages = 723–728 | date = August 2019 | pmid = 31215815 | doi = 10.1080/17512433.2019.1632705 | url = }}</ref> Phenylalaninol is a known ] in ] of solriamfetol.<ref name="FejősTóthVárnai2021">{{cite journal | vauthors = Fejős I, Tóth G, Várnai B, Szabó ZI, Köteles I, Malanga M, Béni S | title = Enantioseparation of solriamfetol and its major impurity phenylalaninol by capillary electrophoresis using sulfated gamma cyclodextrin | journal = Electrophoresis | volume = 42 | issue = 17–18 | pages = 1818–1825 | date = September 2021 | pmid = 34109644 | doi = 10.1002/elps.202100076 | url = }}</ref>


The predicted ] of phenylalaninol is 0.7 to 0.77 and hence it is relatively ].<ref name="PubChem">{{cite web | title=DL-Phenylalaninol | website=PubChem | url=https://pubchem.ncbi.nlm.nih.gov/compound/76652 | access-date=15 January 2025}}</ref><ref name="ChemSpider">{{cite web | title=phenylalaninol | website=ChemSpider | date=10 June 2024 | url=https://www.chemspider.com/Chemical-Structure.69116.html | access-date=15 January 2025}}</ref> The compound appears to be ] in the body by some of the same ]s that transport phenylalanine, such as ].<ref name="ShimomuraFukushimaDanno1975">{{cite journal | vauthors = Shimomura K, Fukushima T, Danno T, Matsumoto K, Miyoshi M | title = Inhibition of intestinal absorption of phenylalanine by phenylalaninol | journal = J Biochem | volume = 78 | issue = 2 | pages = 269–275 | date = August 1975 | pmid = 1228171 | doi = 10.1093/oxfordjournals.jbchem.a130904 | url = }}</ref><ref name="BabuKanaiChairoungdua2003">{{cite journal | vauthors = Babu E, Kanai Y, Chairoungdua A, Kim DK, Iribe Y, Tangtrongsup S, Jutabha P, Li Y, Ahmed N, Sakamoto S, Anzai N, Nagamori S, Endou H | title = Identification of a novel system L amino acid transporter structurally distinct from heterodimeric amino acid transporters | journal = J Biol Chem | volume = 278 | issue = 44 | pages = 43838–45 | date = October 2003 | pmid = 12930836 | doi = 10.1074/jbc.M305221200 | url = }}</ref> The predicted ] of phenylalaninol is 0.7 to 0.77 and hence it is relatively ].<ref name="PubChem">{{cite web | title=DL-Phenylalaninol | website=PubChem | url=https://pubchem.ncbi.nlm.nih.gov/compound/76652 | access-date=15 January 2025}}</ref><ref name="ChemSpider">{{cite web | title=phenylalaninol | website=ChemSpider | date=10 June 2024 | url=https://www.chemspider.com/Chemical-Structure.69116.html | access-date=15 January 2025}}</ref> The compound appears to be ] in the body by some of the same ]s that transport phenylalanine, such as ].<ref name="ShimomuraFukushimaDanno1975">{{cite journal | vauthors = Shimomura K, Fukushima T, Danno T, Matsumoto K, Miyoshi M | title = Inhibition of intestinal absorption of phenylalanine by phenylalaninol | journal = J Biochem | volume = 78 | issue = 2 | pages = 269–275 | date = August 1975 | pmid = 1228171 | doi = 10.1093/oxfordjournals.jbchem.a130904 | url = }}</ref><ref name="BabuKanaiChairoungdua2003">{{cite journal | vauthors = Babu E, Kanai Y, Chairoungdua A, Kim DK, Iribe Y, Tangtrongsup S, Jutabha P, Li Y, Ahmed N, Sakamoto S, Anzai N, Nagamori S, Endou H | title = Identification of a novel system L amino acid transporter structurally distinct from heterodimeric amino acid transporters | journal = J Biol Chem | volume = 278 | issue = 44 | pages = 43838–45 | date = October 2003 | pmid = 12930836 | doi = 10.1074/jbc.M305221200 | doi-access = free | url = }}</ref>

==See also==
* ]


==References== ==References==
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Latest revision as of 05:17, 16 January 2025

Not to be confused with Phenylalanine. Pharmaceutical compound
Phenylalaninol
Clinical data
Other namesDL-Phenylalaninol; Phenylmethylethanolamine; Benzylethanolamine; DL-Phenylglycinol; α-(Hydroxymethyl)phenethylamine; PAL-329; PAL329
Drug classPsychostimulant; Norepinephrine releasing agent; Norepinephrine–dopamine releasing agent
Identifiers
IUPAC name
  • 2-amino-3-phenylpropan-1-ol
CAS Number
PubChem CID
ChemSpider
UNII
ChEMBL
Chemical and physical data
FormulaC9H13NO
Molar mass151.209 g·mol
3D model (JSmol)
SMILES
  • C1=CC=C(C=C1)CC(CO)N
InChI
  • InChI=1S/C9H13NO/c10-9(7-11)6-8-4-2-1-3-5-8/h1-5,9,11H,6-7,10H2
  • Key:STVVMTBJNDTZBF-UHFFFAOYSA-N

Phenylalaninol (code name PAL-329), or DL-phenylalaninol, also known as phenylmethylethanolamine or as α-(hydroxymethyl)phenethylamine, is a psychostimulant and monoamine releasing agent (MRA) of the phenethylamine family. It is related to the amino acid phenylalanine and to the phenethylamine psychostimulants β-phenethylamine (phenylethylamine) and amphetamine (α-methylphenethylamine).

D-Phenylalanine is a psychostimulant and selective norepinephrine releasing agent (NRA) or norepinephrine-preferring norepinephrine–dopamine releasing agent (NDRA). The EC50Tooltip half-maximal effective concentration values of D-phenylalanine for monoamine release are 106 nM for norepinephrine, 1,355 nM for dopamine, and >10,000 nM for serotonin in rat brain synaptosomes. It is dramatically less potent as an MRA than phenethylamine or amphetamine. The potency of D-phenylalaninol in inducing norepinephrine release is 13-fold higher than its potency in inducing dopamine release. Similarly to other dopamine releasers like amphetamine, the drug shows cocaine-like effects and reinforcing properties in rhesus monkeys. The much greater potency of D-phenylalanine in inducing norepinephrine over inducing dopamine release does not appear to interfere with its dopamine release-mediated reinforcing effects.

The clinically used stimulant, wakefulness-promoting agent, and well-balanced norepinephrine–dopamine reuptake inhibitor (NDRI) solriamfetol (brand name Sunosi; O-carbamoyl-D-phenylalaninol) is a derivative of phenylalaninol with a carbamoyl substitution at the hydroxyl group of the molecule. Phenylalaninol is a known impurity in chemical synthesis of solriamfetol.

The predicted log P of phenylalaninol is 0.7 to 0.77 and hence it is relatively hydrophilic. The compound appears to be actively transported in the body by some of the same transporters that transport phenylalanine, such as LAT3.

References

  1. ^ Kohut SJ, Jacobs DS, Rothman RB, Partilla JS, Bergman J, Blough BE (December 2017). "Cocaine-like discriminative stimulus effects of "norepinephrine-preferring" monoamine releasers: time course and interaction studies in rhesus monkeys". Psychopharmacology (Berl). 234 (23–24): 3455–3465. doi:10.1007/s00213-017-4731-5. PMC 5747253. PMID 28889212.
  2. ^ de Moura, Fernando Barreto; Sherwood, Alexander; Prisinzano, Thomas Edward; Kohut, Stephen John; Bergman, Jack (2018). "Intravenous Self-Administration of Synthetic Cathinones in Rhesus Monkeys". The FASEB Journal. 32 (S1). doi:10.1096/fasebj.2018.32.1_supplement.550.3. ISSN 0892-6638.
  3. ^ "DL-Phenylalaninol". PubChem. Retrieved 15 January 2025.
  4. Blough B (July 2008). "Dopamine-releasing agents" (PDF). In Trudell ML, Izenwasser S (eds.). Dopamine Transporters: Chemistry, Biology and Pharmacology. Hoboken : Wiley. pp. 305–320. ISBN 978-0-470-11790-3. OCLC 181862653. OL 18589888W.
  5. Yang J, Gao J (August 2019). "Solriamfetol for the treatment of excessive daytime sleepiness associated with narcolepsy". Expert Rev Clin Pharmacol. 12 (8): 723–728. doi:10.1080/17512433.2019.1632705. PMID 31215815.
  6. Fejős I, Tóth G, Várnai B, Szabó ZI, Köteles I, Malanga M, Béni S (September 2021). "Enantioseparation of solriamfetol and its major impurity phenylalaninol by capillary electrophoresis using sulfated gamma cyclodextrin". Electrophoresis. 42 (17–18): 1818–1825. doi:10.1002/elps.202100076. PMID 34109644.
  7. "phenylalaninol". ChemSpider. 10 June 2024. Retrieved 15 January 2025.
  8. Shimomura K, Fukushima T, Danno T, Matsumoto K, Miyoshi M (August 1975). "Inhibition of intestinal absorption of phenylalanine by phenylalaninol". J Biochem. 78 (2): 269–275. doi:10.1093/oxfordjournals.jbchem.a130904. PMID 1228171.
  9. Babu E, Kanai Y, Chairoungdua A, Kim DK, Iribe Y, Tangtrongsup S, Jutabha P, Li Y, Ahmed N, Sakamoto S, Anzai N, Nagamori S, Endou H (October 2003). "Identification of a novel system L amino acid transporter structurally distinct from heterodimeric amino acid transporters". J Biol Chem. 278 (44): 43838–45. doi:10.1074/jbc.M305221200. PMID 12930836.


Stimulants
Adamantanes
Adenosine antagonists
Alkylamines
Ampakines
Arylcyclohexylamines
Benzazepines
Cathinones
Cholinergics
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Eugeroics
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Phenethylamines
Phenylmorpholines
Piperazines
Piperidines
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ATC code: N06B
Monoamine releasing agents
DRAsTooltip Dopamine releasing agents
NRAsTooltip Norepinephrine releasing agents
SRAsTooltip Serotonin releasing agents
Others
See also: Receptor/signaling modulatorsMonoamine reuptake inhibitorsAdrenergicsDopaminergicsSerotonergicsMonoamine metabolism modulatorsMonoamine neurotoxins
Phenethylamines
Phenethylamines
Amphetamines
Phentermines
Cathinones
Phenylisobutylamines
Phenylalkylpyrrolidines
Catecholamines
(and close relatives)
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