Medazepam: Difference between revisions
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{{ | {{Drugbox | ||
| IUPAC_name = | | Verifiedfields = changed | ||
| image = Medazepam. | | Watchedfields = changed | ||
| image2 = Medazepam3d.png | | verifiedrevid = 462101416 | ||
| | | IUPAC_name = 9-Chloro-2-methyl-6-phenyl-2,5-diazabicyclo[5.4.0]undeca-5,8,10,12-tetraene | ||
| image =Medazepam skeletal.png | |||
| width = 120 | |||
| image2 =Medazepam3d.png | |||
<!--Clinical data--> | |||
| tradename = | |||
| Drugs.com = {{drugs.com|international|medazepam}} | |||
| pregnancy_category = ? | |||
| legal_status = [[Schedule IV controlled substance|Schedule IV]](US) | |||
| routes_of_administration = Oral | |||
<!--Pharmacokinetic data--> | |||
| bioavailability = ? | |||
| metabolism = [[Liver|Hepatic]] | |||
| elimination_half-life = 36-150 hours | |||
| excretion = [[Kidney|Renal]] | |||
<!--Identifiers--> | |||
| CAS_number_Ref = {{cascite|changed|??}} | |||
| CAS_number = 2898-12-6 | | CAS_number = 2898-12-6 | ||
| ATC_prefix = N05 | | ATC_prefix = N05 | ||
| ATC_suffix = BA03 | | ATC_suffix = BA03 | ||
| PubChem = 4041 | | PubChem = 4041 | ||
| DrugBank_Ref = {{drugbankcite|changed|drugbank}} | |||
| DrugBank = none | | DrugBank = none | ||
| C=16 | H=15 | Cl=1 | N=2 | | ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}} | ||
| ChemSpiderID = 3901 | |||
| UNII_Ref = {{fdacite|correct|FDA}} | |||
| UNII = P0J3387W3S | |||
| KEGG_Ref = {{keggcite|correct|kegg}} | |||
| KEGG = D01292 | |||
| ChEMBL_Ref = {{ebicite|correct|EBI}} | |||
| ChEMBL = 28333 | |||
<!--Chemical data--> | |||
| C=16 | H=15 | Cl=1 | N=2 | |||
| molecular_weight = 270.8 | | molecular_weight = 270.8 | ||
| | | smiles = ClC1=CC(C(C2=CC=CC=C2)=NCCN3C)=C3C=C1 | ||
| | | InChI = 1/C16H15ClN2/c1-19-10-9-18-16(12-5-3-2-4-6-12)14-11-13(17)7-8-15(14)19/h2-8,11H,9-10H2,1H3 | ||
| | | InChIKey = YLCXGBZIZBEVPZ-UHFFFAOYAU | ||
| | | StdInChI_Ref = {{stdinchicite|correct|chemspider}} | ||
| | | StdInChI = 1S/C16H15ClN2/c1-19-10-9-18-16(12-5-3-2-4-6-12)14-11-13(17)7-8-15(14)19/h2-8,11H,9-10H2,1H3 | ||
| | | StdInChIKey_Ref = {{stdinchicite|correct|chemspider}} | ||
| | | StdInChIKey = YLCXGBZIZBEVPZ-UHFFFAOYSA-N | ||
}} | }} | ||
__Notoc__ | |||
{{SI}} | |||
{{CMG}} | |||
==Overview== | |||
'''Medazepam''' is a drug that is a [[benzodiazepine]] derivative. It possesses [[anxiolytic]], [[anticonvulsant]], [[sedative]], and [[skeletal muscle relaxant]] properties. It is known by the following brand names: '''Azepamid''', '''Nobrium''', '''Tranquirax''' (mixed with [[Bevonium]]), '''Rudotel''', '''Raporan''', '''Ansilan''' and '''Mezapam'''.<ref>[http://www.drug-encyclopedia.eu/DW_EN/benzodiazepines.shtml Encyclopedia of Drugs: Benzodiazepines<!-- Bot generated title -->]</ref> Medazepam is a long-acting benzodiazepine drug. The half-life of medazepam is 36 – 200 hours.<ref>{{cite web | url = http://www.bcnc.org.uk/equivalence.html | title = BENZODIAZEPINE EQUIVALENCY TABLE | accessdate = September 23, 2007 | author = Professor heather Ashton |date=April 2007 }}</ref> | |||
==Pharmacology== | |||
Benzodiazepine drugs including medazepam increase the inhibitory processes in the cerebral cortex by allosteric modulation of the GABA receptor.<ref>{{cite journal | author = Zakusov VV |author2=Ostrovskaya RU |author3=Kozhechkin SN |author4=Markovich VV |author5=Molodavkin GM |author6=Voronina TA. |date=October 1977 | title = Further evidence for GABA-ergic mechanisms in the action of benzodiazepines. | volume = 229 | issue = 2 | pages = 313–26 | pmid = 23084 | journal = Archives internationales de pharmacodynamie et de thérapie. }}</ref> Benzodiazepines may also act via [[micromolar]] benzodiazepine-binding sites as [[Calcium in biology|Ca<sup>2+</sup>]] channel blockers and significantly inhibited depolarization-sensitive calcium uptake in experiments with cell components from rat brains. This has been conjectured as a mechanism for high dose effects against seizures in a study.<ref>{{cite journal | journal = Proc Natl Acad Sci USA |date=May 1984 | volume = 81 | issue = 10 | pages = 3118–22 | url = http://www.pnas.org/cgi/reprint/81/10/3118.pdf |format=PDF| type = PDF | title = Micromolar-affinity benzodiazepine receptors regulate voltage-sensitive calcium channels in nerve terminal preparations | author = Taft WC |author2=DeLorenzo RJ | pmid = 6328498 | doi = 10.1073/pnas.81.10.3118 | pmc = 345232}}</ref> It has major active benzodiazepine metabolites, which gives it a more prolonged therapeutic effects after administration.<ref>{{cite journal |author=Jochemsen R, Breimer DD |title=Pharmacokinetics of benzodiazepines: metabolic pathways and plasma level profiles |journal=Curr Med Res Opin |volume=8 Suppl 4 |issue= |pages=60–79 |year=1984 |pmid=6144464 |doi= 10.1185/03007998409109545|url=}}</ref> | |||
==Chemistry== | |||
Medazepam can be synthesized in various ways. One is via the reduction of the carbonyl group in diazepam (lacking methyl in Ex 1) by [[lithium aluminium hydride]]. [[Nota bene|N.B.]] If diazepam is reduced with [[Lithium aluminum hydride|LAH]] as in Ex 9, actually the product produced is 7-chloro-1-methyl-5-phenyl-1,2,4,5-tetrahydro-3H-1,4-benzodiazepine, '''not''' medazepam. | |||
[[File:Medazepam synthesis 1.png|600px|center|thumb|Medazepam synthesis 1:<ref>{{Cite doi|10.1021/jo01044a514}}</ref> E. Reeder, Nutley, L.H. Sternbach, {{US Patent|3109843}} (1963).]] | |||
A second way of making medazepam consists of the initial reduction of the [[carbonyl]] group by [[lithium aluminum hydride]] into 7-chloro-5-phenyl-2,3-dihydro-1H-1,4-benzodiazepin-2-one—the first intermediate product in the synthesis of diazepam—which is synthesized by the cyclocondensation of 2-amino-5-chlorobenzophenone with [[glycine]] ethyl ester into 7-chloro-2,3-dihydro-5-phenyl-1H-1,4-benzodiazepine, and the subsequent methylation of the secondary amine nitrogen atom of the resulting product by [[methyl iodide]], using [[sodium hydride]] as a base. | |||
[[File:Medazepam synthesis 2.png|500px|center|thumb|Medazepam synthesis 2: S. Inaba, H. Nagata, {{Cite patent|DE|1934385}} (1971). G.A. Archer, E. Fells, L.H. Sternbach, {{US Patent|3131178}} (1964).]] | |||
A third method of making medazepam consists of a new way of making 7-chloro-2,3-dihydro-5-phenyl-1H-1,4-benzodiazepine, which consists in heterocyclization of | |||
1-(2,5-dichlorophenyl)-1-phenylimine with [[ethylenediamine]]. The starting 1-(2,5-dichlorophenyl)-1-phenylimine is synthesized by the reaction of 2,5-dichlorobenzonitrile | |||
with [[phenylmagnesium bromide]]. | |||
[[File:Medazepam synthesis 3.png|800px|center|thumb|Medazepam synthesis 3: S. Inaba, H.Nagata, {{Cite patent|DE|1934385}} (1969).]] | |||
A fourth method of making medazepam from 4-chloro-''N''-methylaniline is suggested. The last is reacted with [[aziridine]] (or [[ethylene imine]]) in the presence of [[aluminum chloride]], giving ''N''-(4-chlorophenyl)-''N''-methylethylenediamine.<ref>{{Cite patent|GB|1153103}}</ref> [[Acylation]] of the resulting product with [[BzCl]] gives the respective [[amide]], which cyclizes into the desired medazepam using [[phosphorus oxychloride]]. | |||
[[File:Medazepam synthesis 4.png|800px|thumb|center|Medazepam synthesis 4: K.H. Heinrich, {{Cite patent|DE|1695188}} (1967) {{Cite patent|DE|1795811}} (1967).]] | |||
A fifth method also exists: | |||
[[File:Medazepam synth1.png|700px|center|thumb|Medazepam synthesis 5<ref>{{Cite doi|10.1002/cber.19691021133}}</ref>]] | |||
<!-- Finally, a couple of last methods:<ref>{{Cite doi|10.1002/jhet.5570140545}}</ref><ref>{{Cite doi|10.1248/cpb.20.1628}}</ref> --> | |||
== | ==See also== | ||
*[[Benzodiazepine]] | |||
*[[Benzodiazepine withdrawal syndrome]] | |||
==References== | ==References== | ||
{{Reference|2}} | |||
==External links== | ==External links== | ||
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{{Benzodiazepines}} | {{Benzodiazepines}} | ||
{{Anxiolytics}} | {{Anxiolytics}} | ||
[[Category:Drug]] | |||
[[Category:Benzodiazepines]] | |||
[[ | [[Category:Organochlorides]] | ||
[[ | |||
[[ | |||
Latest revision as of 18:39, 9 April 2015
Clinical data | |
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AHFS/Drugs.com | International Drug Names |
Pregnancy category |
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Routes of administration | Oral |
ATC code | |
Legal status | |
Legal status |
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Pharmacokinetic data | |
Bioavailability | ? |
Metabolism | Hepatic |
Elimination half-life | 36-150 hours |
Excretion | Renal |
Identifiers | |
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CAS Number | |
PubChem CID | |
DrugBank | |
ChemSpider | |
UNII | |
KEGG | |
ChEMBL | |
E number | {{#property:P628}} |
ECHA InfoCard | {{#property:P2566}}Lua error in Module:EditAtWikidata at line 36: attempt to index field 'wikibase' (a nil value). |
Chemical and physical data | |
Formula | C16H15ClN2 |
Molar mass | 270.8 |
3D model (JSmol) | |
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(what is this?) (verify) |
WikiDoc Resources for Medazepam |
Articles |
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Most recent articles on Medazepam |
Media |
Evidence Based Medicine |
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Ongoing Trials on Medazepam at Clinical Trials.gov Clinical Trials on Medazepam at Google
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US National Guidelines Clearinghouse on Medazepam
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Books |
News |
Commentary |
Definitions |
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Patient resources on Medazepam Discussion groups on Medazepam Directions to Hospitals Treating Medazepam Risk calculators and risk factors for Medazepam
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Overview
Medazepam is a drug that is a benzodiazepine derivative. It possesses anxiolytic, anticonvulsant, sedative, and skeletal muscle relaxant properties. It is known by the following brand names: Azepamid, Nobrium, Tranquirax (mixed with Bevonium), Rudotel, Raporan, Ansilan and Mezapam.[1] Medazepam is a long-acting benzodiazepine drug. The half-life of medazepam is 36 – 200 hours.[2]
Pharmacology
Benzodiazepine drugs including medazepam increase the inhibitory processes in the cerebral cortex by allosteric modulation of the GABA receptor.[3] Benzodiazepines may also act via micromolar benzodiazepine-binding sites as Ca2+ channel blockers and significantly inhibited depolarization-sensitive calcium uptake in experiments with cell components from rat brains. This has been conjectured as a mechanism for high dose effects against seizures in a study.[4] It has major active benzodiazepine metabolites, which gives it a more prolonged therapeutic effects after administration.[5]
Chemistry
Medazepam can be synthesized in various ways. One is via the reduction of the carbonyl group in diazepam (lacking methyl in Ex 1) by lithium aluminium hydride. N.B. If diazepam is reduced with LAH as in Ex 9, actually the product produced is 7-chloro-1-methyl-5-phenyl-1,2,4,5-tetrahydro-3H-1,4-benzodiazepine, not medazepam.
A second way of making medazepam consists of the initial reduction of the carbonyl group by lithium aluminum hydride into 7-chloro-5-phenyl-2,3-dihydro-1H-1,4-benzodiazepin-2-one—the first intermediate product in the synthesis of diazepam—which is synthesized by the cyclocondensation of 2-amino-5-chlorobenzophenone with glycine ethyl ester into 7-chloro-2,3-dihydro-5-phenyl-1H-1,4-benzodiazepine, and the subsequent methylation of the secondary amine nitrogen atom of the resulting product by methyl iodide, using sodium hydride as a base.
A third method of making medazepam consists of a new way of making 7-chloro-2,3-dihydro-5-phenyl-1H-1,4-benzodiazepine, which consists in heterocyclization of 1-(2,5-dichlorophenyl)-1-phenylimine with ethylenediamine. The starting 1-(2,5-dichlorophenyl)-1-phenylimine is synthesized by the reaction of 2,5-dichlorobenzonitrile with phenylmagnesium bromide.
A fourth method of making medazepam from 4-chloro-N-methylaniline is suggested. The last is reacted with aziridine (or ethylene imine) in the presence of aluminum chloride, giving N-(4-chlorophenyl)-N-methylethylenediamine.[7] Acylation of the resulting product with BzCl gives the respective amide, which cyclizes into the desired medazepam using phosphorus oxychloride.
A fifth method also exists:
See also
References
External links
Template:Benzodiazepines Template:Anxiolytics
- ↑ Encyclopedia of Drugs: Benzodiazepines
- ↑ Professor heather Ashton (April 2007). "BENZODIAZEPINE EQUIVALENCY TABLE". Retrieved September 23, 2007.
- ↑ Zakusov VV; Ostrovskaya RU; Kozhechkin SN; Markovich VV; Molodavkin GM; Voronina TA. (October 1977). "Further evidence for GABA-ergic mechanisms in the action of benzodiazepines". Archives internationales de pharmacodynamie et de thérapie. 229 (2): 313–26. PMID 23084.
- ↑ Taft WC; DeLorenzo RJ (May 1984). "Micromolar-affinity benzodiazepine receptors regulate voltage-sensitive calcium channels in nerve terminal preparations" (PDF). Proc Natl Acad Sci USA (PDF). 81 (10): 3118–22. doi:10.1073/pnas.81.10.3118. PMC 345232. PMID 6328498.
- ↑ Jochemsen R, Breimer DD (1984). "Pharmacokinetics of benzodiazepines: metabolic pathways and plasma level profiles". Curr Med Res Opin. 8 Suppl 4: 60–79. doi:10.1185/03007998409109545. PMID 6144464.
- ↑ Template:Cite doi
- ↑ GB 1153103
- ↑ Template:Cite doi
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- Benzodiazepines
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