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36505-84-7

36505-84-7 Structure

36505-84-7 Structure
IdentificationMore
[Name]

Buspirone
[CAS]

36505-84-7
[Synonyms]

8-[4-[4-(2-PYRIMIDINYL)-1-PIPERAZINYL]BUTYL]-8-AZASPIRO[4,5]DECANE-7,9-DIONE
8-[4-[4-(2-PYRIMIDINYL)-1-PIPERAZINYL]BUTYL]-8-AZASPIRO[4,5]DECANE-7,9-DIONE HYDROCHLORIDE
buspar
BUSPIRONE
BUSPIRONE HCL
BUSPIRONE HYDROCHLORIDE
N-[4-(4-[2-PYRIMIDINYL]-1-PIPERAZINYL)BUTYL]-8-AZASPIRO[4,5]DECANE-7,9-DIONE HYDROCHLORIDE
5)decane-7,9-dione,8-(4-(4-(2-pyrimidinyl)piperizinyl)butyl)-8-azaspiro(
8-(4-(4-(2-pyrimidinyl)-1-piperizinyl)butyl)-8-azaspiro(4,5)decane-7,9-dione
BUSPIRONE,USP
Buspirone (base and/or unspecified salts)
BUPROPIONHCL
Ansiced:Axoren
Buspimen
Buspisal
Nard:Tmvin
[EINECS(EC#)]

253-072-2
[Molecular Formula]

C21H31N5O2
[MDL Number]

MFCD00078569
[Molecular Weight]

385.5
[MOL File]

36505-84-7.mol
Chemical PropertiesBack Directory
[Melting point ]

105-107 °C(Solv: ethyl acetate (141-78-6))
[Boiling point ]

511.93°C (rough estimate)
[density ]

1.1527 (rough estimate)
[refractive index ]

1.7600 (estimate)
[storage temp. ]

2-8°C
[form ]

Solid
[pka]

pKa 7.60±0.01(H2O t=25.0 I=0.1(NaCl)) (Uncertain)
[color ]

White to off-white
[BCS Class]

1
[CAS DataBase Reference]

36505-84-7(CAS DataBase Reference)
[NIST Chemistry Reference]

8-Azaspiro[4.5]decane-7,9-dione, 8-[4-[4-(2-pyrimidinyl)-1-piperazinyl]butyl]-(36505-84-7)
[EPA Substance Registry System]

8-Azaspiro[4.5]decane-7,9-dione, 8-[4-[4-(2-pyrimidinyl)-1-piperazinyl]butyl]- (36505-84-7)
Safety DataBack Directory
[Hazard Codes ]

T
[Risk Statements ]

R25:Toxic if swallowed.
[Safety Statements ]

S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) .
[RIDADR ]

UN 2811 6.1/PG 3
[WGK Germany ]

3
[RTECS ]

CL9915000
[REACH Registrations]

Active
Raw materials And Preparation ProductsBack Directory
[Raw materials]

Dichloromethane-->Chloroform-->Sodium nitrite-->Triethylamine-->Isopropyl alcohol-->Piperazine-->2-Cyanoacetamide-->Cyclopentanone-->Methyl cyanoacetate-->Glutaric acid-->2-Aminopyrimidine-->Glutaric anhydride-->2-Chloropyrimidine-->2-(1-Piperazinyl)pyrimidine-->Glutarimide
Hazard InformationBack Directory
[Uses]

5-Chloro Buspirone is an impurity of Buspirone Hydrochloride (B689850), a non-benzodiazepine anxiolytic and a 5-hydroxytryptamine (5-HT1) receptor agonist.
[Uses]

Buspirone is an extremely specific drug that could possibly represent a new chemical class of anxiolytics—azaspirones. As an anxiolytic, its activity is equal to that of benzodiazepines; however, it is devoid of anticonvulsant and muscle relaxant properties, which are characteristic of benzodiazepines.
[Uses]

Tranquilizer (minor).
[Definition]

ChEBI: An azaspiro compound that is 8-azaspiro[4.5]decane-7,9-dione substituted at the nitrogen atom by a 4-(piperazin-1-yl)butyl group which in turn is substituted by a pyrimidin-2-yl group at the N4 position.
[Brand name]

Buspar (Bristol-Myers Squibb).
[Biological Functions]

Buspirone (BuSpar) is the first example of a class of anxiolytic agents that can relieve some symptoms of anxiety in doses that do not cause sedation. Buspirone is structurally unrelated to existing psychotropic drugs.
[General Description]

The initial compound in this series, buspirone (BuSpar), hasanxiolytic and antidepressant activities and is a partial5-HT1A agonist. Its anxiolytic activity is reportedly causedby its ability to diminish 5-HT release (via 5-HT1A agonism).High short-term synaptic levels of 5-HT are characteristic ofanxiety. Also, because it is a partial agonist, it can stimulatepostsynaptic receptors when 5-HT levels are low in thesynapse, as is the case in depression. Several other spironesare in development as anxiolytics and antidepressants.
[Mechanism of action]

Although buspirone has been shown to interact with a number of neurotransmitter systems in the brain, it appears that its clinically relevant effects are mediated through interactions at the serotonin (5-hydroxytryptamine, 5-HT) 5-HT1A receptor, where it acts as a partial agonist.
[Pharmacology]

Buspirone is as effective as the benzodiazepines in the treatment of general anxiety. However, the full anxiolytic effect of buspirone takes several weeks to develop, whereas the anxiolytic effect of the benzodiazepines is maximal after a few days of therapy. In therapeutic doses, buspirone has little or no sedative effect and lacks the muscle relaxant and anticonvulsant properties of the benzodiazepines. In addition, buspirone does not potentiate the central nervous system depression caused by sedative–hypnotic drugs or by alcohol, and it does not prevent the symptoms associated with benzodiazepine withdrawal.
[Clinical Use]

Buspirone is effective in general anxiety and in anxiety with depression.
[Side effects]

Like the benzodiazepines, buspirone appears to be safe even when given in very high doses. The most common side effects are dizziness, light-headedness, and headache. Abuse, dependence, and withdrawal have not been reported, and buspirone administration does not produce any cross-tolerance to the benzodiazepines. Buspirone has been reported to increase blood pressure in patients taking monoamine oxidase inhibitors, and it may increase plasma levels of haloperidol if coadministered with that agent.
[Synthesis]

Buspirone, 8-[4-[4-(2-pyrimidyl)-1-piperazinyl]butyl]-8-azaspiro [4,5] decan-7,9-dione (5.2.6), is synthesized by the reaction of 1-(2-pyrimidyl)-4- (4-aminobutyl)piperazine (5.2.4) with 8-oxaspiro[4,5]decan-7,9-dione (5.2.5). In turn, 1- (2-pyrimidyl)-4-(4-aminobutyl)piperazine (5.2.4) is synthesized by the reaction of 1-(2-pyrimidyl)piperazine with 4-chlorobutyronitrile, giving 4-(2-pyrimidyl)-1-(3- cyanopropyl)piperazine (5.2.3), which is hydrogenated with Raney nickel into buspirone (5.2.4) [51¨C55].

Synthesis_36505-84-7

[Metabolism]

Buspirone is well absorbed from the gastrointestinal tract, and peak blood levels are achieved in 1 to 1.5 hours; the drug is more than 95% bound to plasma proteins. Buspirone is extensively metabolized, with less than 1% of the parent drug excreted into the urine unchanged. At least one of the metabolic products of buspirone is biologically active. The parent drug has an elimination half-life of 4 to 6 hours.
Spectrum DetailBack Directory
[Spectrum Detail]

Buspirone(36505-84-7)1HNMR
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