Metaclazepam

Metaclazepam
Clinical data
Trade names	Talis
ATC code	none;
Identifiers
	IUPAC name 7-bromo-5-(2-chlorophenyl)-2-(methoxymethyl)-1-methyl-2,3-dihydro-1,4-benzodiazepine;
CAS Number	84031-17-4 ;
PubChem CID	71272;
ChemSpider	64398 ;
UNII	C2N2B1303L;
ChEMBL	ChEMBL1290783;
CompTox Dashboard (EPA)	DTXSID40905121 ;
Chemical and physical data
Formula	C18H18BrClN2O
Molar mass	393.71 g·mol−1
3D model (JSmol)	Interactive image;
	SMILES ClC1=CC=CC=C1C2=NCC(COC)N(C)C3=C2C=C(Br)C=C3;
	InChI InChI=1S/C18H18BrClN2O/c1-22-13(11-23-2)10-21-18(14-5-3-4-6-16(14)20)15-9-12(19)7-8-17(15)22/h3-9,13H,10-11H2,1-2H3 ; Key:WABYCCJHARSRBH-UHFFFAOYSA-N ;
	(verify)

Metaclazepam^[1] (marketed under the brand name Talis) is a drug which is a benzodiazepine derivative.^[2]^[3] It is a relatively selective anxiolytic with less sedative or muscle relaxant properties than other benzodiazepines such as diazepam or bromazepam.^[4] It has an active metabolite N-desmethylmetaclazepam, which is the main metabolite of metaclazepam.^[5] There is no significant difference in metabolism between younger and older individuals.^[6]

Metaclazepam is slightly more effective as an anxiolytic than bromazepam,^[7] or diazepam,^[8] with a 15 mg dose of metaclazepam equivalent to 4 mg of bromazepam.^[9] Metaclazepam can interact with alcohol producing additive sedative-hypnotic effects.^[6]^[10] Fatigue is a common side effect from metaclazepam at high doses.^[11] Small amounts of metaclazepam as well as its metabolites enter into human breast milk.^[12]

References

^ US 4098786
^ Borchers F, Achtert G, Hausleiter HJ, Zeugner H (1984). "Metabolism and pharmacokinetics of metaclazepam (Talis), Part III: Determination of the chemical structure of metabolites in dogs, rabbits and men". European Journal of Drug Metabolism and Pharmacokinetics. 9 (4): 325–46. doi:10.1007/bf03189684. PMID 6532806. S2CID 12290664.
^ Althaus W, Block J, Förster A, Kühnhold M, Meister D, Wischniewski M (September 1986). "Analytical profile of metaclazepam". Arzneimittel-Forschung. 36 (9): 1302–6. PMID 3790179.
^ Buschmann G, Kühl UG, Rohte O (1985). "General pharmacology of the anxiolytic compound metaclazepam in comparison to other benzodiazepines". Arzneimittel-Forschung. 35 (11): 1643–55. PMID 2868732.
^ Gielsdorf W, Molz KH, Hausleiter HJ, Achtert G, Philipp P (1986). "Pharmacokinetic profile of metaclazepam (Talis), a new 1.4-benzodiazepine. Influence of different dosage regimens on the pharmacokinetic profile of metaclazepam and its main metabolite under steady-state conditions". European Journal of Drug Metabolism and Pharmacokinetics. 11 (3): 205–10. doi:10.1007/bf03189848. PMID 3816876. S2CID 8493668.
^ ^a ^b Molz KH, Gielsdorf W, Rasper J, Jaeger H, Hausleiter HJ, Achtert G, Philipp P (1985). "Comparison of the pharmacokinetic profile of metaclazepam in old and young volunteers". European Journal of Clinical Pharmacology. 29 (2): 247–9. doi:10.1007/bf00547431. PMID 4076323. S2CID 8017809.
^ Bilone F, Roncari R (1988). "A double-blind comparison of the anxiolytic activity of two benzodiazepines, metaclazepam and bromazepam, in anxiety neurosis". Current Medical Research and Opinion. 11 (1): 45–7. doi:10.1185/03007998809111130. PMID 2898321.
^ Laakmann G, Blaschke D, Hippius H, Schewe S (May 1989). "Double-blind study of metaclazepam versus diazepam treatment of outpatients with anxiety syndrome". Pharmacopsychiatry. 22 (3): 120–5. doi:10.1055/s-2007-1014593. PMID 2568645.
^ Marano P, Patti F, Nicoletti F (1988). "Controlled study on the anxiolytic activity of a newly-developed benzodiazepine, metaclazepam". Current Medical Research and Opinion. 11 (1): 41–4. doi:10.1185/03007998809111129. PMID 2898320.
^ Schmidt V (1983). "". Beiträge zur Gerichtlichen Medizin. 41: 413–7. PMID 6639614.
^ Laakmann G, Blaschke D, Hippius H, Schewe S (May 1988). "Double-blind randomized trial of the benzodiazepine derivative metaclazepam as compared with placebo treatment of outpatients with anxiety syndromes". Pharmacopsychiatry. 21 (3): 136–43. doi:10.1055/s-2007-1014665. PMID 2900514.
^ Schotter A, Müller R, Günther C, Hausleiter HJ, Achtert G (November 1989). "Transfer of metaclazepam and its metabolites into breast milk". Arzneimittel-Forschung. 39 (11): 1468–70. PMID 2575907.

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[1] US 4098786

[Borchers--2] Borchers F, Achtert G, Hausleiter HJ, Zeugner H (1984). "Metabolism and pharmacokinetics of metaclazepam (Talis), Part III: Determination of the chemical structure of metabolites in dogs, rabbits and men". European Journal of Drug Metabolism and Pharmacokinetics. 9 (4): 325–46. doi:10.1007/bf03189684. PMID 6532806. S2CID 12290664.

[3] Althaus W, Block J, Förster A, Kühnhold M, Meister D, Wischniewski M (September 1986). "Analytical profile of metaclazepam". Arzneimittel-Forschung. 36 (9): 1302–6. PMID 3790179.

[4] Buschmann G, Kühl UG, Rohte O (1985). "General pharmacology of the anxiolytic compound metaclazepam in comparison to other benzodiazepines". Arzneimittel-Forschung. 35 (11): 1643–55. PMID 2868732.

[5] Gielsdorf W, Molz KH, Hausleiter HJ, Achtert G, Philipp P (1986). "Pharmacokinetic profile of metaclazepam (Talis), a new 1.4-benzodiazepine. Influence of different dosage regimens on the pharmacokinetic profile of metaclazepam and its main metabolite under steady-state conditions". European Journal of Drug Metabolism and Pharmacokinetics. 11 (3): 205–10. doi:10.1007/bf03189848. PMID 3816876. S2CID 8493668.

[ReferenceA-6] Molz KH, Gielsdorf W, Rasper J, Jaeger H, Hausleiter HJ, Achtert G, Philipp P (1985). "Comparison of the pharmacokinetic profile of metaclazepam in old and young volunteers". European Journal of Clinical Pharmacology. 29 (2): 247–9. doi:10.1007/bf00547431. PMID 4076323. S2CID 8017809.

[Bilone-1988-7] Bilone F, Roncari R (1988). "A double-blind comparison of the anxiolytic activity of two benzodiazepines, metaclazepam and bromazepam, in anxiety neurosis". Current Medical Research and Opinion. 11 (1): 45–7. doi:10.1185/03007998809111130. PMID 2898321.

[8] Laakmann G, Blaschke D, Hippius H, Schewe S (May 1989). "Double-blind study of metaclazepam versus diazepam treatment of outpatients with anxiety syndrome". Pharmacopsychiatry. 22 (3): 120–5. doi:10.1055/s-2007-1014593. PMID 2568645.

[9] Marano P, Patti F, Nicoletti F (1988). "Controlled study on the anxiolytic activity of a newly-developed benzodiazepine, metaclazepam". Current Medical Research and Opinion. 11 (1): 41–4. doi:10.1185/03007998809111129. PMID 2898320.

[10] Schmidt V (1983). "". Beiträge zur Gerichtlichen Medizin. 41: 413–7. PMID 6639614.

[11] Laakmann G, Blaschke D, Hippius H, Schewe S (May 1988). "Double-blind randomized trial of the benzodiazepine derivative metaclazepam as compared with placebo treatment of outpatients with anxiety syndromes". Pharmacopsychiatry. 21 (3): 136–43. doi:10.1055/s-2007-1014665. PMID 2900514.

[12] Schotter A, Müller R, Günther C, Hausleiter HJ, Achtert G (November 1989). "Transfer of metaclazepam and its metabolites into breast milk". Arzneimittel-Forschung. 39 (11): 1468–70. PMID 2575907.

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v t e Benzodiazepines
1,4-Benzodiazepines	2-Oxoquazepam 3-Hydroxyphenazepam Bromazepam BMS-906024* Camazepam Carburazepam Chlordiazepoxide Cinazepam Cinolazepam Clonazepam Cloniprazepam Clorazepate Cyprazepam Delorazepam Demoxepam Desmethylflunitrazepam Devazepide* Diazepam Diclazepam Difludiazepam Doxefazepam Elfazepam Ethyl carfluzepate Ethyl dirazepate Ethyl loflazepate Flubromazepam Fletazepam Fludiazepam Flunitrazepam Flurazepam Flutemazepam Flutoprazepam Fosazepam Gidazepam Halazepam Iclazepam Irazepine* Kenazepine Ketazolam Lorazepam Lormetazepam Lufuradom* Meclonazepam Medazepam Menitrazepam Metaclazepam Motrazepam N-Desalkylflurazepam Nifoxipam Nimetazepam Nitemazepam Nitrazepam Nitrazepate Nordazepam Nortetrazepam Oxazepam Phenazepam Pinazepam Pivoxazepam Prazepam Proflazepam Quazepam QH-II-66 Reclazepam RO4491533* Ro05-4082 Ro5-4864* Ro07-5220 Ro07-9749 Ro20-8065 Ro20-8552 SH-I-048A Sulazepam Temazepam Tetrazepam Tifluadom* Timelotem* Tolufazepam Triflunordazepam Tuclazepam Uldazepam
1,5-Benzodiazepines	Arfendazam Clobazam CP-1414S Lofendazam Triflubazam
2,3-Benzodiazepines*	Girisopam GYKI-52466 GYKI-52895 Nerisopam Talampanel Tofisopam
Triazolobenzodiazepines	Adinazolam Alprazolam Balovaptan* Bromazolam Clonazolam Estazolam Fluadinazolam Flualprazolam Flubromazolam Flunitrazolam Nitrazolam Phenazolam Pyrazolam Rilmazolam (active metabolite of Rilmazafone) Triazolam
Imidazobenzodiazepines	Bretazenil Climazolam EVT-201 FG-8205 Flumazenil GL-II-73 Imidazenil ¹²³I-Iomazenil L-655,708 Loprazolam Midazolam PWZ-029 Remimazolam Ro15-4513 Ro48-6791 Ro48-8684 Ro4938581 Sarmazenil SH-053-R-CH3-2′F
Oxazolobenzodiazepines	Cloxazolam Flutazolam Haloxazolam Mexazolam Oxazolam
Thienodiazepines	Bentazepam Clotiazepam Ro09-9212
Thienotriazolodiazepines	α-Hydroxyetizolam Apafant* Brotizolam Ciclotizolam Clotizolam Deschloroclotizolam Deschloroetizolam Etizolam Flubrotizolam Fluclotizolam Fluetizolam Israpafant* JQ1* Metizolam
Thienobenzodiazepines*	Olanzapine Telenzepine
Pyridodiazepines	Lopirazepam
Pyridotriazolodiazepines	Zapizolam
Pyrazolodiazepines	Razobazam* Ripazepam Zolazepam Zomebazam Zometapine*
Pyrrolodiazepines	Premazepam
Tetrahydroisoquinobenzodiazepines	Clazolam
Pyrrolobenzodiazepines*	Anthramycin
Benzodiazepine prodrugs	Alprazolam triazolobenzophenone Avizafone Rilmazafone
* atypical activity profile (not GABA_A receptor ligands)

v t e GABA_A receptor positive modulators
Alcohols	Brometone Butanol Chloralodol Chlorobutanol (cloretone) Ethanol (alcohol) (alcoholic drink) Ethchlorvynol Isobutanol Isopropanol Menthol Methanol Methylpentynol Pentanol Petrichloral Propanol tert-Butanol (2M2P) tert-Pentanol (2M2B) Tribromoethanol Trichloroethanol Triclofos Trifluoroethanol
Barbiturates	(-)-DMBB Allobarbital Alphenal Amobarbital Aprobarbital Barbexaclone Barbital Benzobarbital Benzylbutylbarbiturate Brallobarbital Brophebarbital Butabarbital/Secbutabarbital Butalbital Buthalital Butobarbital Butallylonal Carbubarb Crotylbarbital Cyclobarbital Cyclopentobarbital Difebarbamate Enallylpropymal Ethallobarbital Eterobarb Febarbamate Heptabarb Heptobarbital Hexethal Hexobarbital Metharbital Methitural Methohexital Methylphenobarbital Narcobarbital Nealbarbital Pentobarbital Phenallymal Phenobarbital Phetharbital Primidone Probarbital Propallylonal Propylbarbital Proxibarbital Reposal Secobarbital Sigmodal Spirobarbital Talbutal Tetrabamate Tetrabarbital Thialbarbital Thiamylal Thiobarbital Thiobutabarbital Thiopental Thiotetrabarbital Valofane Vinbarbital Vinylbital
Benzodiazepines	2-Oxoquazepam 3-Hydroxyphenazepam Adinazolam Alprazolam Arfendazam Avizafone Bentazepam Bretazenil Bromazepam Bromazolam Brotizolam Camazepam Carburazepam Chlordiazepoxide Ciclotizolam Cinazepam Cinolazepam Clazolam Climazolam Clobazam Clonazepam Clonazolam Cloniprazepam Clorazepate Clotiazepam Cloxazolam CP-1414S Cyprazepam Delorazepam Demoxepam Diazepam Diclazepam Dimdazenil Doxefazepam Elfazepam Estazolam Ethyl carfluzepate Ethyl dirazepate Ethyl loflazepate Etizolam FG-8205 Fletazepam Flubromazepam Flubromazolam Fludiazepam Flunitrazepam Flunitrazolam Flurazepam Flutazolam Flutemazepam Flutoprazepam Fosazepam Gidazepam Halazepam Haloxazolam Iclazepam Imidazenil Irazepine Ketazolam Lofendazam Lopirazepam Loprazolam Lorazepam Lormetazepam Meclonazepam Medazepam Menitrazepam Metaclazepam Mexazolam Midazolam Motrazepam N-Desalkylflurazepam Nifoxipam Nimetazepam Nitrazepam Nitrazepate Nitrazolam Nordazepam Nortetrazepam Oxazepam Oxazolam Phenazepam Pinazepam Pivoxazepam Prazepam Premazepam Proflazepam Pyrazolam QH-II-66 Quazepam Reclazepam Remimazolam Rilmazafone Ripazepam Ro48-6791 Ro48-8684 SH-053-R-CH3-2′F Sulazepam Temazepam Tetrazepam Tolufazepam Triazolam Triflubazam Triflunordazepam (Ro5-2904) Tuclazepam Uldazepam Zapizolam Zolazepam Zomebazam
Carbamates	Carisbamate Carisoprodol Clocental Cyclarbamate Difebarbamate Emylcamate Ethinamate Febarbamate Felbamate Hexapropymate Hydroxyphenamate Lorbamate Mebutamate Meprobamate Nisobamate Pentabamate Phenprobamate Procymate Styramate Tetrabamate Tybamate
Flavonoids	6-Methylapigenin Ampelopsin (dihydromyricetin) Apigenin Baicalein Baicalin Catechin EGC EGCG Hispidulin Linarin Luteolin Rc-OMe Skullcap constituents (e.g., baicalin) Wogonin
Imidazoles	Etomidate Metomidate Propoxate
Kava constituents	10-Methoxyyangonin 11-Methoxyyangonin 11-Hydroxyyangonin Desmethoxyyangonin 11-Methoxy-12-hydroxydehydrokavain 7,8-Dihydroyangonin Kavain 5-Hydroxykavain 5,6-Dihydroyangonin 7,8-Dihydrokavain 5,6,7,8-Tetrahydroyangonin 5,6-Dehydromethysticin Methysticin 7,8-Dihydromethysticin Yangonin
Monoureides	Acecarbromal Apronal (apronalide) Bromisoval Carbromal Capuride Ectylurea
Neuroactive steroids	Acebrochol Allopregnanolone (brexanolone) Alfadolone Alfaxalone 3α-Androstanediol Androstenol Androsterone Certain anabolic-androgenic steroids Cholesterol DHDOC 3α-DHP 5α-DHP 5β-DHP DHT Etiocholanolone Ganaxolone Hydroxydione Minaxolone ORG-20599 ORG-21465 P1-185 Posovolone Pregnanolone (eltanolone) Progesterone Renanolone SAGE-105 SAGE-324 SAGE-516 SAGE-689 SAGE-872 Testosterone THDOC Zuranolone
Nonbenzodiazepines	Cyclopyrrolones: Eszopiclone Pagoclone Pazinaclone Suproclone Suriclone Zopiclone Imidazopyridines: Alpidem DS-1 Necopidem Saripidem Zolpidem Pyrazolopyrimidines: Divaplon Fasiplon Indiplon Lorediplon Ocinaplon Panadiplon Taniplon Zaleplon Others: Adipiplon CGS-8216 CGS-9896 CGS-13767 CGS-20625 CL-218,872 CP-615,003 CTP-354 ELB-139 GBLD-345 Imepitoin JM-1232 L-838,417 Lirequinil (Ro41-3696) NS-2664 NS-2710 NS-11394 Pipequaline ROD-188 RWJ-51204 SB-205,384 SX-3228 TGSC01AA TP-003 TPA-023 TP-13 U-89843A U-90042 Viqualine Y-23684
Phenols	Fospropofol Propofol Thymol
Piperidinediones	Glutethimide Methyprylon Piperidione Pyrithyldione
Pyrazolopyridines	Cartazolate Etazolate ICI-190,622 Tracazolate
Quinazolinones	Afloqualone Cloroqualone Diproqualone Etaqualone Mebroqualone Mecloqualone Methaqualone Methylmethaqualone Nitromethaqualone SL-164
Volatiles/gases	Acetone Acetophenone Acetylglycinamide chloral hydrate Aliflurane Benzene Butane Butylene Centalun Chloral Chloral betaine Chloral hydrate Chloroform Cryofluorane Desflurane Dichloralphenazone Dichloromethane Diethyl ether Enflurane Ethyl chloride Ethylene Fluroxene Gasoline Halopropane Halothane Isoflurane Kerosine Methoxyflurane Methoxypropane Nitric oxide Nitrogen Nitrous oxide Norflurane Paraldehyde Propane Propylene Roflurane Sevoflurane Synthane Teflurane Toluene Trichloroethane (methyl chloroform) Trichloroethylene Vinyl ether
Others/unsorted	3-Hydroxybutanal α-EMTBL AA-29504 Alogabat Avermectins (e.g., ivermectin) Bromide compounds (e.g., lithium bromide, potassium bromide, sodium bromide) Carbamazepine Chloralose Chlormezanone Clomethiazole Darigabat DEABL Deuterated etifoxine Dihydroergolines (e.g., dihydroergocryptine, dihydroergosine, dihydroergotamine, ergoloid (dihydroergotoxine)) DS2 Efavirenz Etazepine Etifoxine Fenamates (e.g., flufenamic acid, mefenamic acid, niflumic acid, tolfenamic acid) Fluoxetine Flupirtine Hopantenic acid KRM-II-81 Lanthanum Lavender oil Lignans (e.g., 4-O-methylhonokiol, honokiol, magnolol, obovatol) Loreclezole Menthyl isovalerate (validolum) Monastrol Niacin Niacinamide Org 25,435 Phenytoin Propanidid Retigabine (ezogabine) Safranal Seproxetine Stiripentol Sulfonylalkanes (e.g., sulfonmethane (sulfonal), tetronal, trional) Terpenoids (e.g., borneol) Topiramate Valerian constituents (e.g., isovaleric acid, isovaleramide, valerenic acid, valerenol) Unsorted benzodiazepine site positive modulators: α-Pinene MRK-409 (MK-0343) TCS-1105 TCS-1205
See also: Receptor/signaling modulators • GABA receptor modulators • GABA metabolism/transport modulators

See also

References