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F0430

Sigma-Aldrich

Fenobam

≥98% (HPLC), solid

Synonym(s):

N-(3-Chlorophenyl)-N′-(4,5-dihydro-1-methyl-4-oxo-1H-imidazole-2-yl)urea

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About This Item

Empirical Formula (Hill Notation):
C11H11ClN4O2
CAS Number:
57653-26-6
Molecular Weight:
266.68
MDL number:
MFCD00868019
UNSPSC Code:
12352200
PubChem Substance ID:
24894721
NACRES:
NA.77

Assay

≥98% (HPLC)

form

solid

color

white

solubility

DMSO: >20 mg/mL

originator

Johnson & Johnson

storage temp.

2-8°C

SMILES string

CN1CC(=O)N=C1NC(=O)Nc2cccc(Cl)c2

InChI

1S/C11H11ClN4O2/c1-16-6-9(17)14-10(16)15-11(18)13-8-4-2-3-7(12)5-8/h2-5H,6H2,1H3,(H2,13,14,15,17,18)

InChI key

DWPQODZAOSWNHB-UHFFFAOYSA-N

Biochem/physiol Actions

Fenobam is a potent, selective, noncompetitive glutamate mGluR5 receptor antagonist. Fenobam displays inverse agonist properties; blocks mGluR5 constitutive activity in vitro (IC50 = 87 nM, slightly weaker than MPEP). Fenobam acts at an allosteric modulatory site shared with MPEP and binds the mGlu5 receptor with Kd values of 54 and 31 nM for rat and human receptors, respectively. Fenobam belongs to a structurally different class than MPEP; devoid of GABAergic activity and thus typical benzodiazepine-like side effects; displays anxiolytic activity.

Features and Benefits

This compound is a featured product for Neuroscience research. Click here to discover more featured Neuroscience products. Learn more about bioactive small molecules for other areas of research at sigma.com/discover-bsm.
This compound is featured on the Glutamate Receptors (G Protein Family) page of the Handbook of Receptor Classification and Signal Transduction. To browse other handbook pages, click here.
This compound was developed by Johnson & Johnson. To browse the list of other pharma-developed compounds and Approved Drugs/Drug Candidates, click here.

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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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1H- and 13C-NMR spectra of fenobam.
G Pellizer et al.
Journal of pharmaceutical sciences, 72(2), 189-190 (1983-02-01)
Wolfgang Jacob et al.
Neuropharmacology, 57(2), 97-108 (2009-05-12)
Fenobam [N-(3-chlorophenyl)-N'-(4,5-dihydro-1-methyl-4-oxo-1H-imidazole-2-yl)urea] was suggested to possess anxiolytic actions 30 years ago. Hoffmann-La Roche researchers recently reported that it is a selective and potent mGlu5 receptor antagonist, acting as a negative allosteric modulator. In the present study, we show that fenobam
Laura F Cavallone et al.
Pain, 161(1), 135-146 (2019-10-01)
Metabotropic glutamate receptor 5 (mGlu5) has been shown to modulate nociception in animals, but no mGlu5 antagonists have been developed commercially as analgesics. The mGlu5 antagonist fenobam [N-(3-chlorophenyl)-N'-(4,5-dihydro-1-methyl-4-oxo-1H-imidazole-2-yl)urea] was originally evaluated for development as a nonbenzodiazepine anxiolytic. Fenobam is analgesic
Pari Malherbe et al.
Journal of neurochemistry, 98(2), 601-615 (2006-06-30)
Fenobam [N-(3-chlorophenyl)-N'-(4,5-dihydro-1-methyl-4-oxo-1H-imidazole-2-yl)urea], a clinically validated non-benzodiazepine anxiolytic, has been shown to be a potent and non-competitive metabotropic glutamate (mGlu)-5 receptor antagonist. In the present study, we have used the site-directed mutagenesis coupled with three-dimensional receptor-based pharmacophore modelling to elucidate the
Daniella Rylander et al.
Neurobiology of disease, 39(3), 352-361 (2010-05-11)
L-DOPA remains the gold-standard treatment for Parkinson's disease but causes motor fluctuations and dyskinesia. Metabotropic glutamate receptor type 5 (mGluR5) has been proposed as a target for antidyskinetic therapies. Here, we evaluate the effects of fenobam, a noncompetitive mGluR5 antagonist
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