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G013

Sigma-Aldrich

R(+)-Baclofen hydrochloride

solid

Synonym(s):

Arbaclofen hydrochloride, R(+)-β-(Aminomethyl)-4-chlorobenzenepropanoic acid hydrochloride, STX209

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About This Item

Empirical Formula (Hill Notation):
C10H12ClNO2 · HCl
CAS Number:
63701-55-3
Molecular Weight:
250.12
MDL number:
MFCD00078579
UNSPSC Code:
12352200
PubChem Substance ID:
24895006
NACRES:
NA.32

form

solid

Quality Level

100

optical activity

[α]28/D +3.8°, c = 0.9 in methanol(lit.)

storage condition

desiccated

color

white

solubility

DMSO: >20 mg/mL
H2O: 26 mg/mL (Solutions may be stored for several weeks at 4 °C.)

SMILES string

Cl[H].NC[C@H](CC(O)=O)c1ccc(Cl)cc1

InChI

1S/C10H12ClNO2.ClH/c11-9-3-1-7(2-4-9)8(6-12)5-10(13)14;/h1-4,8H,5-6,12H2,(H,13,14);1H/t8-;/m0./s1

InChI key

WMNUVYYLMCMHLU-QRPNPIFTSA-N

Gene Information

human ... GABBR1(2550)
mouse ... GABBR1(54393)
rat ... GABBR1(81657)

Application

R(+)-Baclofen hydrochloride has been used as a GABAB receptor agonist to study its effects on M43068-induced antinociception in rat models. It has also been used as a GABAB receptor agonist to study its effects on amphetamine-induced behavior and neurochemical responses in rat striatum.

Biochem/physiol Actions

Baclofen is a derivative of γ-aminobutyric acid (GABA) and acts as a 4-aminobutanoic acid receptor (GABAB) agonist. It interacts stereospecifically with the GABA receptor and exhibits antispastic effects.Baclofen shows therapeutic effects against paroxysmal pain of trigeminal neuralgia and spinal spasticity. R(+)-Baclofen is a more active enantiomer.

Other Notes

Same enantiomer as R(−)-baclofen free base.

Storage Class

11 - Combustible Solids

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Yuriko Watanabe et al.
European journal of pharmacology, 837, 88-95 (2018-08-08)
The nucleus accumbens contains delta-opioid receptors that may decrease inhibitory neurotransmission. As GABAB receptors inhibit dopamine release, decrease in activation of GABAB receptors may be a mediator of delta-opioid receptor-induced accumbal dopamine efflux. If so, accumbal dopamine efflux induced by
Synthesis of both enantiomers of baclofen using (R)-and (S)-N-phenylpantolactam as chiral auxiliaries
Camps P, et al.
Tetrahedron Asymmetry, 15(13) (2004)
Reagan L Pennock et al.
The Journal of physiology, 592(19), 4247-4256 (2014-08-03)
It has recently been shown that dynorphin A (Dyn A), an endogenous agonist of the κ-opioid receptor (KOR), directly inhibits proopiomelanocortin (POMC) neurons in the hypothalamus through activation of G-protein-coupled inwardly rectifying K(+) channels (GIRKs). This effect has been proposed
Intracerebral Baclofen Administration Decreases Amphetamine-Induced Behavior and Neuropeptide Gene Expression in the Striatum
Wenxia Z, et al.
Neuropsychopharmacology, 880?890-880?890 (2004)
An efficient synthesis of (R)-and (S)-baclofen via desymmetrization
Ji L, et al.
Tetrahedron Letters, 50(45), 6166-6168 (2009)
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